TY  - JOUR
AU  - Stojanovska, Zdenka A.
AU  - Boev, Blažo
AU  - Bossew, Peter
AU  - Ristova, Mimoza
AU  - Dimov, Gorgi
AU  - Boev, Ivan
AU  - Žunić, Zora S.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8613
AB  - To establish baseline values for concentrations of terrestrial radionuclides for the Republic of North Macedonia, a survey covering the entire territory was performed. The 213 soil samples were collected from regions around the major settlements and cities, approximately evenly distributed over the geotectonic units which constitute the country's geological foundation. The specific activities of radionuclides were measured by gamma spectrometry. The following geometric mean values and geometric standard deviations were obtained: 550 Bqkg(-1) (1.47) for K-40, (37) Bqkg(-1) (1.33) for Ra-226, 38 Bqkg(-1) for U-238, and 38 Bqkg(-1) (1.53) for Th-232 in dry soil. The relation between specific activities of natural radionuclides and geology was investigated. Correlation between radionuclides, which may serve as additional geochemical indicators, and geology could not be found convincingly,. Mutual correlations between Ra-226, U-238, and Th-232 activities were found to be high (Spearman rho about 0.8), whereas the ones between these and K-40 are a bit lower, somewhat above rho = 0.6.
T2  - Nuclear Technology and Radiation Protection
T1  - Analysis of specific radionuclides activity variations in soil within geotectonic units of Republic of North Macedonia
VL  - 34
IS  - 1
SP  - 85
EP  - 93
DO  - 10.2298/NTRP180718017S
ER  - 

@article{
author = "Stojanovska, Zdenka A. and Boev, Blažo and Bossew, Peter and Ristova, Mimoza and Dimov, Gorgi and Boev, Ivan and Žunić, Zora S.",
year = "2019",
abstract = "To establish baseline values for concentrations of terrestrial radionuclides for the Republic of North Macedonia, a survey covering the entire territory was performed. The 213 soil samples were collected from regions around the major settlements and cities, approximately evenly distributed over the geotectonic units which constitute the country's geological foundation. The specific activities of radionuclides were measured by gamma spectrometry. The following geometric mean values and geometric standard deviations were obtained: 550 Bqkg(-1) (1.47) for K-40, (37) Bqkg(-1) (1.33) for Ra-226, 38 Bqkg(-1) for U-238, and 38 Bqkg(-1) (1.53) for Th-232 in dry soil. The relation between specific activities of natural radionuclides and geology was investigated. Correlation between radionuclides, which may serve as additional geochemical indicators, and geology could not be found convincingly,. Mutual correlations between Ra-226, U-238, and Th-232 activities were found to be high (Spearman rho about 0.8), whereas the ones between these and K-40 are a bit lower, somewhat above rho = 0.6.",
journal = "Nuclear Technology and Radiation Protection",
title = "Analysis of specific radionuclides activity variations in soil within geotectonic units of Republic of North Macedonia",
volume = "34",
number = "1",
pages = "85-93",
doi = "10.2298/NTRP180718017S"
}

Stojanovska, Z. A., Boev, B., Bossew, P., Ristova, M., Dimov, G., Boev, I.,& Žunić, Z. S.. (2019). Analysis of specific radionuclides activity variations in soil within geotectonic units of Republic of North Macedonia. in Nuclear Technology and Radiation Protection, 34(1), 85-93.
https://doi.org/10.2298/NTRP180718017S

Stojanovska ZA, Boev B, Bossew P, Ristova M, Dimov G, Boev I, Žunić ZS. Analysis of specific radionuclides activity variations in soil within geotectonic units of Republic of North Macedonia. in Nuclear Technology and Radiation Protection. 2019;34(1):85-93.
doi:10.2298/NTRP180718017S .

Stojanovska, Zdenka A., Boev, Blažo, Bossew, Peter, Ristova, Mimoza, Dimov, Gorgi, Boev, Ivan, Žunić, Zora S., "Analysis of specific radionuclides activity variations in soil within geotectonic units of Republic of North Macedonia" in Nuclear Technology and Radiation Protection, 34, no. 1 (2019):85-93,
https://doi.org/10.2298/NTRP180718017S . .

TY  - JOUR
AU  - Stojanovska, Zdenka A.
AU  - Ivanova, Kremena
AU  - Bossew, Peter
AU  - Boev, Blažo
AU  - Žunić, Zora S.
AU  - Tsenova, Martina
AU  - Ćurguz, Zoran
AU  - Kolarž, Predrag M.
AU  - Zdravkovska, Milka
AU  - Ristova, Mimoza
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1606
AB  - We present a method for the estimation of annual radon concentration based on short-term (three months) measurements. The study involves results from two independent sets of indoor radon concentration measurements performed in 16 cities of the Republic of Macedonia. The first data set contains winter and annual radon concentration obtained during the National survey in 2010 and the second, contains only the radon concentration measured during the winter of 2013. Both data sets pertain to radon concentration from the same cities and have been measured applying the same methodology in ground floor dwellings. The results appeared to be consistent and the dispersion of radon concentration was low. Linear regression analysis of the radon concentration measured in winter of 2010 and of the 2010 annual radon concentration revealed a high coefficient of determination R-2 = 0.92, with a relative uncertainty of 3%. Furthermore, this model was used to estimate the annual radon concentration solely from winter-term measurements performed in 2013. The geometrical mean of the estimated annual radon concentration of the 2013: radon concentration (A-2013) =98 Bqm(-3) was almost equal to the geometrical mean of the annual radon concentration from the 2010, radon concentration (A-2010) = 99 Bqm(-3). Analysis of the influence of building characteristics, such as presence/absence of a basement in the building, or the dominant building material on the estimated annual radon concentration is also reported. Our results show that a low number of relatively short-term radon measurements may produce a reasonable insight into a gross average obtained in a larger survey.
T2  - Nuclear technology and radiation protection
T1  - Prediction of Long-Term Indoor Radon Concentration Based on Short-Term Measurements
VL  - 32
IS  - 1
SP  - 77
EP  - 84
DO  - 10.2298/NTRP1701077S
ER  - 

@article{
author = "Stojanovska, Zdenka A. and Ivanova, Kremena and Bossew, Peter and Boev, Blažo and Žunić, Zora S. and Tsenova, Martina and Ćurguz, Zoran and Kolarž, Predrag M. and Zdravkovska, Milka and Ristova, Mimoza",
year = "2017",
abstract = "We present a method for the estimation of annual radon concentration based on short-term (three months) measurements. The study involves results from two independent sets of indoor radon concentration measurements performed in 16 cities of the Republic of Macedonia. The first data set contains winter and annual radon concentration obtained during the National survey in 2010 and the second, contains only the radon concentration measured during the winter of 2013. Both data sets pertain to radon concentration from the same cities and have been measured applying the same methodology in ground floor dwellings. The results appeared to be consistent and the dispersion of radon concentration was low. Linear regression analysis of the radon concentration measured in winter of 2010 and of the 2010 annual radon concentration revealed a high coefficient of determination R-2 = 0.92, with a relative uncertainty of 3%. Furthermore, this model was used to estimate the annual radon concentration solely from winter-term measurements performed in 2013. The geometrical mean of the estimated annual radon concentration of the 2013: radon concentration (A-2013) =98 Bqm(-3) was almost equal to the geometrical mean of the annual radon concentration from the 2010, radon concentration (A-2010) = 99 Bqm(-3). Analysis of the influence of building characteristics, such as presence/absence of a basement in the building, or the dominant building material on the estimated annual radon concentration is also reported. Our results show that a low number of relatively short-term radon measurements may produce a reasonable insight into a gross average obtained in a larger survey.",
journal = "Nuclear technology and radiation protection",
title = "Prediction of Long-Term Indoor Radon Concentration Based on Short-Term Measurements",
volume = "32",
number = "1",
pages = "77-84",
doi = "10.2298/NTRP1701077S"
}

Stojanovska, Z. A., Ivanova, K., Bossew, P., Boev, B., Žunić, Z. S., Tsenova, M., Ćurguz, Z., Kolarž, P. M., Zdravkovska, M.,& Ristova, M.. (2017). Prediction of Long-Term Indoor Radon Concentration Based on Short-Term Measurements. in Nuclear technology and radiation protection, 32(1), 77-84.
https://doi.org/10.2298/NTRP1701077S

Stojanovska ZA, Ivanova K, Bossew P, Boev B, Žunić ZS, Tsenova M, Ćurguz Z, Kolarž PM, Zdravkovska M, Ristova M. Prediction of Long-Term Indoor Radon Concentration Based on Short-Term Measurements. in Nuclear technology and radiation protection. 2017;32(1):77-84.
doi:10.2298/NTRP1701077S .

Stojanovska, Zdenka A., Ivanova, Kremena, Bossew, Peter, Boev, Blažo, Žunić, Zora S., Tsenova, Martina, Ćurguz, Zoran, Kolarž, Predrag M., Zdravkovska, Milka, Ristova, Mimoza, "Prediction of Long-Term Indoor Radon Concentration Based on Short-Term Measurements" in Nuclear technology and radiation protection, 32, no. 1 (2017):77-84,
https://doi.org/10.2298/NTRP1701077S . .

TY  - JOUR
AU  - Stojanovska, Zdenka A.
AU  - Boev, Blažo
AU  - Žunić, Zora S.
AU  - Ivanova, Kremena
AU  - Ristova, Mimoza
AU  - Tsenova, Martina
AU  - Šorša, Ajka
AU  - Janevik, Emilija
AU  - Taleski, Vaso
AU  - Bossew, Peter
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1034
AB  - Subject of this study is an investigation of the variations of indoor radon concentration and ambient dose equivalent rate in outdoor and indoor environments of 40 dwellings, 31 elementary schools and five kindergartens. The buildings are located in three municipalities of two, geologically different, areas of the Republic of Macedonia. Indoor radon concentrations were measured by nuclear track detectors, deployed in the most occupied room of the building, between June 2013 and May 2014. During the deploying campaign, indoor and outdoor ambient dose equivalent rates were measured simultaneously at the same location. It appeared that the measured values varied from 22 to 990 Bq/m(3) for indoor radon concentrations, from 50 to 195 nSv/h for outdoor ambient dose equivalent rates, and from 38 to 184 nSv/h for indoor ambient dose equivalent rates. The geometric mean value of indoor to outdoor ambient dose equivalent rates was found to be 0.88, i.e. the outdoor ambient dose equivalent rates were on average higher than the indoor ambient dose equivalent rates. All measured can reasonably well be described by log-normal distributions. A detailed statistical analysis of factors which influence the measured quantities is reported.
PB  - Springer
T2  - Radiation and Environmental Biophysics
T1  - Variation of indoor radon concentration and ambient dose equivalent rate in different outdoor and indoor environments
VL  - 55
IS  - 2
SP  - 171
EP  - 183
DO  - 10.1007/s00411-016-0640-y
ER  - 

@article{
author = "Stojanovska, Zdenka A. and Boev, Blažo and Žunić, Zora S. and Ivanova, Kremena and Ristova, Mimoza and Tsenova, Martina and Šorša, Ajka and Janevik, Emilija and Taleski, Vaso and Bossew, Peter",
year = "2016",
abstract = "Subject of this study is an investigation of the variations of indoor radon concentration and ambient dose equivalent rate in outdoor and indoor environments of 40 dwellings, 31 elementary schools and five kindergartens. The buildings are located in three municipalities of two, geologically different, areas of the Republic of Macedonia. Indoor radon concentrations were measured by nuclear track detectors, deployed in the most occupied room of the building, between June 2013 and May 2014. During the deploying campaign, indoor and outdoor ambient dose equivalent rates were measured simultaneously at the same location. It appeared that the measured values varied from 22 to 990 Bq/m(3) for indoor radon concentrations, from 50 to 195 nSv/h for outdoor ambient dose equivalent rates, and from 38 to 184 nSv/h for indoor ambient dose equivalent rates. The geometric mean value of indoor to outdoor ambient dose equivalent rates was found to be 0.88, i.e. the outdoor ambient dose equivalent rates were on average higher than the indoor ambient dose equivalent rates. All measured can reasonably well be described by log-normal distributions. A detailed statistical analysis of factors which influence the measured quantities is reported.",
publisher = "Springer",
journal = "Radiation and Environmental Biophysics",
title = "Variation of indoor radon concentration and ambient dose equivalent rate in different outdoor and indoor environments",
volume = "55",
number = "2",
pages = "171-183",
doi = "10.1007/s00411-016-0640-y"
}

Stojanovska, Z. A., Boev, B., Žunić, Z. S., Ivanova, K., Ristova, M., Tsenova, M., Šorša, A., Janevik, E., Taleski, V.,& Bossew, P.. (2016). Variation of indoor radon concentration and ambient dose equivalent rate in different outdoor and indoor environments. in Radiation and Environmental Biophysics
Springer., 55(2), 171-183.
https://doi.org/10.1007/s00411-016-0640-y

Stojanovska ZA, Boev B, Žunić ZS, Ivanova K, Ristova M, Tsenova M, Šorša A, Janevik E, Taleski V, Bossew P. Variation of indoor radon concentration and ambient dose equivalent rate in different outdoor and indoor environments. in Radiation and Environmental Biophysics. 2016;55(2):171-183.
doi:10.1007/s00411-016-0640-y .

Stojanovska, Zdenka A., Boev, Blažo, Žunić, Zora S., Ivanova, Kremena, Ristova, Mimoza, Tsenova, Martina, Šorša, Ajka, Janevik, Emilija, Taleski, Vaso, Bossew, Peter, "Variation of indoor radon concentration and ambient dose equivalent rate in different outdoor and indoor environments" in Radiation and Environmental Biophysics, 55, no. 2 (2016):171-183,
https://doi.org/10.1007/s00411-016-0640-y . .

TY  - JOUR
AU  - Stojanovska, Zdenka A.
AU  - Bossew, Peter
AU  - Tokonami, Shinji
AU  - Žunić, Zora S.
AU  - Bochicchio, Francesco
AU  - Boev, Blažo
AU  - Ristova, Mimoza
AU  - Januseski, Jovan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5403
AB  - As a part of the national survey of natural radioactivity in The Former Yugoslav Republic of Macedonia, indoor thoron gas concentration was measured in 300 dwellings during one year, from December 2008 till December 2009 using passive discriminative radon thoron detectors. Detectors were deployed at a distance of GT 50 cm from walls in order to be less sensitive to distance from walls. Altogether 532 measurements were performed: 53 in winter, 57 in spring, 122 in summer and 300 in autumn. The frequency distribution is well described by a log-normal function. The geometric means of indoor thoron concentration (with geometric standard deviations in brackets) in winter, spring, summer and autumn were obtained to be: 39 Bq m(-3) (3.4), 32 Bq m(-3) (2.8), 18 Bq m(-3) (2.8), 31 Bq m(-3) (2.9), respectively. Seasonal variations of thoron appear lower than those of radon. The seasonal corrected annual mean concentration ranges between 3 and 272 Bq m(-3) with a geometric mean of 28 Bq m(-3) (2.12). A detailed statistical analysis of the geogenic and building factors which influence the indoor thoron concentration is also reported. This survey represents the first national survey on indoor thoron in continental Europe. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Radiation Measurements
T1  - National survey of indoor thoron concentration in FYR of Macedonia (continental Europe - Balkan region)
VL  - 49
SP  - 57
EP  - 66
DO  - 10.1016/j.radmeas.2012.11.023
ER  - 

@article{
author = "Stojanovska, Zdenka A. and Bossew, Peter and Tokonami, Shinji and Žunić, Zora S. and Bochicchio, Francesco and Boev, Blažo and Ristova, Mimoza and Januseski, Jovan",
year = "2013",
abstract = "As a part of the national survey of natural radioactivity in The Former Yugoslav Republic of Macedonia, indoor thoron gas concentration was measured in 300 dwellings during one year, from December 2008 till December 2009 using passive discriminative radon thoron detectors. Detectors were deployed at a distance of GT 50 cm from walls in order to be less sensitive to distance from walls. Altogether 532 measurements were performed: 53 in winter, 57 in spring, 122 in summer and 300 in autumn. The frequency distribution is well described by a log-normal function. The geometric means of indoor thoron concentration (with geometric standard deviations in brackets) in winter, spring, summer and autumn were obtained to be: 39 Bq m(-3) (3.4), 32 Bq m(-3) (2.8), 18 Bq m(-3) (2.8), 31 Bq m(-3) (2.9), respectively. Seasonal variations of thoron appear lower than those of radon. The seasonal corrected annual mean concentration ranges between 3 and 272 Bq m(-3) with a geometric mean of 28 Bq m(-3) (2.12). A detailed statistical analysis of the geogenic and building factors which influence the indoor thoron concentration is also reported. This survey represents the first national survey on indoor thoron in continental Europe. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Radiation Measurements",
title = "National survey of indoor thoron concentration in FYR of Macedonia (continental Europe - Balkan region)",
volume = "49",
pages = "57-66",
doi = "10.1016/j.radmeas.2012.11.023"
}

Stojanovska, Z. A., Bossew, P., Tokonami, S., Žunić, Z. S., Bochicchio, F., Boev, B., Ristova, M.,& Januseski, J.. (2013). National survey of indoor thoron concentration in FYR of Macedonia (continental Europe - Balkan region). in Radiation Measurements, 49, 57-66.
https://doi.org/10.1016/j.radmeas.2012.11.023

Stojanovska ZA, Bossew P, Tokonami S, Žunić ZS, Bochicchio F, Boev B, Ristova M, Januseski J. National survey of indoor thoron concentration in FYR of Macedonia (continental Europe - Balkan region). in Radiation Measurements. 2013;49:57-66.
doi:10.1016/j.radmeas.2012.11.023 .

Stojanovska, Zdenka A., Bossew, Peter, Tokonami, Shinji, Žunić, Zora S., Bochicchio, Francesco, Boev, Blažo, Ristova, Mimoza, Januseski, Jovan, "National survey of indoor thoron concentration in FYR of Macedonia (continental Europe - Balkan region)" in Radiation Measurements, 49 (2013):57-66,
https://doi.org/10.1016/j.radmeas.2012.11.023 . .

TY  - JOUR
AU  - Bossew, Peter
AU  - Stojanovska, Zdenka A.
AU  - Žunić, Zora S.
AU  - Ristova, Mimoza
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6998
AB  - Geo-referenced datasets of indoor radon concentrations and radium concentrations in soil are available for the Republic of Macedonia. However, the indoor Rn-222 data are spatially strongly clustered as the measurements were essentially confined to major towns and cities. Hence, the estimation of the geographical distribution of Rn-222 concentration based only on the Rn-222 data is difficult to be made. On the other hand, geochemical measurements Ra-226 are quite well distributed over the country. Since Ra-226 is the source of Rn-222, one may think of using Ra-226 as a predictor for Rn-222. In this paper we present a method for modelling the stochastic dependency of indoor Rn-222 of soil Ra-226. The method is new in the area on Rn-222 assessment and still needs to be validated by more case studies. It must be born in mind that the indoor Rn-222 depends, in some cases more strongly, on controlling factors other than the Ra-226 in soil, so that its estimation from Ra-226 alone is inevitably imperfect. The results must therefore be understood as estimates in absence of other information, and as a motivation to carry out measurements in regions where the model predicts higher Rn-222 levels, but for which no measurements are available so far.
T2  - Romanian Journal of Physics
T1  - Prediction of Indoor Radon Risk from Radium Concentration in Soil: Republic of Macedonia Case Study
VL  - 58
SP  - S29
EP  - S43
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6998
ER  - 

@article{
author = "Bossew, Peter and Stojanovska, Zdenka A. and Žunić, Zora S. and Ristova, Mimoza",
year = "2013",
abstract = "Geo-referenced datasets of indoor radon concentrations and radium concentrations in soil are available for the Republic of Macedonia. However, the indoor Rn-222 data are spatially strongly clustered as the measurements were essentially confined to major towns and cities. Hence, the estimation of the geographical distribution of Rn-222 concentration based only on the Rn-222 data is difficult to be made. On the other hand, geochemical measurements Ra-226 are quite well distributed over the country. Since Ra-226 is the source of Rn-222, one may think of using Ra-226 as a predictor for Rn-222. In this paper we present a method for modelling the stochastic dependency of indoor Rn-222 of soil Ra-226. The method is new in the area on Rn-222 assessment and still needs to be validated by more case studies. It must be born in mind that the indoor Rn-222 depends, in some cases more strongly, on controlling factors other than the Ra-226 in soil, so that its estimation from Ra-226 alone is inevitably imperfect. The results must therefore be understood as estimates in absence of other information, and as a motivation to carry out measurements in regions where the model predicts higher Rn-222 levels, but for which no measurements are available so far.",
journal = "Romanian Journal of Physics",
title = "Prediction of Indoor Radon Risk from Radium Concentration in Soil: Republic of Macedonia Case Study",
volume = "58",
pages = "S29-S43",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6998"
}

Bossew, P., Stojanovska, Z. A., Žunić, Z. S.,& Ristova, M.. (2013). Prediction of Indoor Radon Risk from Radium Concentration in Soil: Republic of Macedonia Case Study. in Romanian Journal of Physics, 58, S29-S43.
https://hdl.handle.net/21.15107/rcub_vinar_6998

Bossew P, Stojanovska ZA, Žunić ZS, Ristova M. Prediction of Indoor Radon Risk from Radium Concentration in Soil: Republic of Macedonia Case Study. in Romanian Journal of Physics. 2013;58:S29-S43.
https://hdl.handle.net/21.15107/rcub_vinar_6998 .

Bossew, Peter, Stojanovska, Zdenka A., Žunić, Zora S., Ristova, Mimoza, "Prediction of Indoor Radon Risk from Radium Concentration in Soil: Republic of Macedonia Case Study" in Romanian Journal of Physics, 58 (2013):S29-S43,
https://hdl.handle.net/21.15107/rcub_vinar_6998 .

TY  - JOUR
AU  - Stojanovska, Zdenka A.
AU  - Januseski, Jovan
AU  - Bossew, Peter
AU  - Žunić, Zora S.
AU  - Tollefsen, Tore
AU  - Ristova, Mimoza
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4442
AB  - This paper presents the results of the seasonal indoor radon concentration measurements in dwellings in all regions of the Former Yugoslav Republic (FYR) of Macedonia. The measurements were made in 437 dwellings using CR-39 track detectors over four successive three-month periods (winter, spring, summer and autumn) throughout 2009. The results of analysis of variance showed statistically significant differences between indoor radon concentrations in different seasons. The geometric mean values and geometric standard deviations of indoor radon concentrations in winter, spring, summer and autumn were obtained to be: 115 Bq m(-3) (2.02), 72 Bq m(-3) (1.97), 46 Bq m(-3) (1.95), 92 Bq m(-3) (2.02), respectively. The geometric mean values of spring, summer and autumn to winter ratios were found to be: 0.63 (1.50), 0.40 (1.81), and 0.80 (1.58), respectively. The results of the analysis of the variance showed statistically significant differences among the indoor radon measurements for the regions in different seasons. The influence of the factors linked to building characteristics in relation to radon measurements in different seasons was examined. The factors which enable a differentiation into subgroups (significance level p LT 0.05) are the floor level, basement and building materials. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Radiation Measurements
T1  - Seasonal indoor radon concentration in FYR of Macedonia
VL  - 46
IS  - 6-7
SP  - 602
EP  - 610
DO  - 10.1016/j.radmeas.2011.04.022
ER  - 

@article{
author = "Stojanovska, Zdenka A. and Januseski, Jovan and Bossew, Peter and Žunić, Zora S. and Tollefsen, Tore and Ristova, Mimoza",
year = "2011",
abstract = "This paper presents the results of the seasonal indoor radon concentration measurements in dwellings in all regions of the Former Yugoslav Republic (FYR) of Macedonia. The measurements were made in 437 dwellings using CR-39 track detectors over four successive three-month periods (winter, spring, summer and autumn) throughout 2009. The results of analysis of variance showed statistically significant differences between indoor radon concentrations in different seasons. The geometric mean values and geometric standard deviations of indoor radon concentrations in winter, spring, summer and autumn were obtained to be: 115 Bq m(-3) (2.02), 72 Bq m(-3) (1.97), 46 Bq m(-3) (1.95), 92 Bq m(-3) (2.02), respectively. The geometric mean values of spring, summer and autumn to winter ratios were found to be: 0.63 (1.50), 0.40 (1.81), and 0.80 (1.58), respectively. The results of the analysis of the variance showed statistically significant differences among the indoor radon measurements for the regions in different seasons. The influence of the factors linked to building characteristics in relation to radon measurements in different seasons was examined. The factors which enable a differentiation into subgroups (significance level p LT 0.05) are the floor level, basement and building materials. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Radiation Measurements",
title = "Seasonal indoor radon concentration in FYR of Macedonia",
volume = "46",
number = "6-7",
pages = "602-610",
doi = "10.1016/j.radmeas.2011.04.022"
}

Stojanovska, Z. A., Januseski, J., Bossew, P., Žunić, Z. S., Tollefsen, T.,& Ristova, M.. (2011). Seasonal indoor radon concentration in FYR of Macedonia. in Radiation Measurements, 46(6-7), 602-610.
https://doi.org/10.1016/j.radmeas.2011.04.022

Stojanovska ZA, Januseski J, Bossew P, Žunić ZS, Tollefsen T, Ristova M. Seasonal indoor radon concentration in FYR of Macedonia. in Radiation Measurements. 2011;46(6-7):602-610.
doi:10.1016/j.radmeas.2011.04.022 .

Stojanovska, Zdenka A., Januseski, Jovan, Bossew, Peter, Žunić, Zora S., Tollefsen, Tore, Ristova, Mimoza, "Seasonal indoor radon concentration in FYR of Macedonia" in Radiation Measurements, 46, no. 6-7 (2011):602-610,
https://doi.org/10.1016/j.radmeas.2011.04.022 . .