TY  - JOUR
AU  - Đokić, Mrđan
AU  - Manić, Miloš
AU  - Đorđević, Milan
AU  - Gocić, Milena
AU  - Čupić, Aleksandar
AU  - Jović, Mihajlo D.
AU  - Dragović, Ranko M.
AU  - Gajić, Boško
AU  - Smičiklas, Ivana D.
AU  - Dragović, Snežana D.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11383
AB  - Gully erosion leads to the formation of deep and wide channels that increase the risk of soil loss, flooding, and
water pollution. In addition, this process reduces the productivity and viability of agricultural land and natural
ecosystems. Preventing gully erosion is critical for maintaining ecological balance and preserving natural resources in certain areas. This paper presents a methodology integrating remote sensing and nuclear techniques to
study gully erosion. The morphometric characterization of gullies using 360-degree camera photogrammetry was
introduced as a new method in erosion research. This approach aims to investigate the suitability of unmanned
aerial vehicle and terrestrial photogrammetry for modeling gullies, to study the variability of erosion processes in
gullies at a small scale, and to compare the differences in erosion intensity between nearby gullies. The study’s
objectives include identifying the effective and economical method for gullies monitoring and providing a
starting point for controlling and safeguarding gullies. Mainly erosion process was detected in the studied gullies,
while deposition was identified at only 2 out of 39 sampling locations. The results showed an average soil
redistribution rate of 16.2 t ha− 1 yr− 1 and coefficients of variation of 32%, 59%, and 91% for three investigated
gullies. It was determined that aerial photogrammetry methods were not practical under the conditions prevailing in the study area. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. It was confirmed that the micro-relief obtained by photogrammetric modeling is an essential contribution
to erosion research. The 360-degree camera photogrammetry serves as a reliable tool for analyzing the
morphology of gullies and, in perspective, tracking changes in gully systems over time or monitoring the
effectiveness of the applied protection measures.
T2  - Environmental Research
T1  - Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia
VL  - 235
SP  - 116679
DO  - 10.1016/j.envres.2023.116679
ER  - 

@article{
author = "Đokić, Mrđan and Manić, Miloš and Đorđević, Milan and Gocić, Milena and Čupić, Aleksandar and Jović, Mihajlo D. and Dragović, Ranko M. and Gajić, Boško and Smičiklas, Ivana D. and Dragović, Snežana D.",
year = "2023",
abstract = "Gully erosion leads to the formation of deep and wide channels that increase the risk of soil loss, flooding, and
water pollution. In addition, this process reduces the productivity and viability of agricultural land and natural
ecosystems. Preventing gully erosion is critical for maintaining ecological balance and preserving natural resources in certain areas. This paper presents a methodology integrating remote sensing and nuclear techniques to
study gully erosion. The morphometric characterization of gullies using 360-degree camera photogrammetry was
introduced as a new method in erosion research. This approach aims to investigate the suitability of unmanned
aerial vehicle and terrestrial photogrammetry for modeling gullies, to study the variability of erosion processes in
gullies at a small scale, and to compare the differences in erosion intensity between nearby gullies. The study’s
objectives include identifying the effective and economical method for gullies monitoring and providing a
starting point for controlling and safeguarding gullies. Mainly erosion process was detected in the studied gullies,
while deposition was identified at only 2 out of 39 sampling locations. The results showed an average soil
redistribution rate of 16.2 t ha− 1 yr− 1 and coefficients of variation of 32%, 59%, and 91% for three investigated
gullies. It was determined that aerial photogrammetry methods were not practical under the conditions prevailing in the study area. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. It was confirmed that the micro-relief obtained by photogrammetric modeling is an essential contribution
to erosion research. The 360-degree camera photogrammetry serves as a reliable tool for analyzing the
morphology of gullies and, in perspective, tracking changes in gully systems over time or monitoring the
effectiveness of the applied protection measures.",
journal = "Environmental Research",
title = "Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia",
volume = "235",
pages = "116679",
doi = "10.1016/j.envres.2023.116679"
}

Đokić, M., Manić, M., Đorđević, M., Gocić, M., Čupić, A., Jović, M. D., Dragović, R. M., Gajić, B., Smičiklas, I. D.,& Dragović, S. D.. (2023). Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia. in Environmental Research, 235, 116679.
https://doi.org/10.1016/j.envres.2023.116679

Đokić M, Manić M, Đorđević M, Gocić M, Čupić A, Jović MD, Dragović RM, Gajić B, Smičiklas ID, Dragović SD. Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia. in Environmental Research. 2023;235:116679.
doi:10.1016/j.envres.2023.116679 .

Đokić, Mrđan, Manić, Miloš, Đorđević, Milan, Gocić, Milena, Čupić, Aleksandar, Jović, Mihajlo D., Dragović, Ranko M., Gajić, Boško, Smičiklas, Ivana D., Dragović, Snežana D., "Remote sensing and nuclear techniques for high-resolution mapping and quantification of gully erosion in the highly erodible area of the Malčanska River Basin, Eastern Serbia" in Environmental Research, 235 (2023):116679,
https://doi.org/10.1016/j.envres.2023.116679 . .

TY  - CONF
AU  - Đokić, Mrđan
AU  - Manić, Miloš
AU  - Đorđević, Milan
AU  - Gocić, Milena
AU  - Čupić, Aleksandar
AU  - Jović, Mihajlo
AU  - Dragović, Ranko
AU  - Gajić, Boško
AU  - Smičiklas, Ivana
AU  - Dragović, Snežana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12343
AB  - The gully erosion is one of the most significant land degradation processes. Although gully erosion significantly threatens agricultural productivity and natural ecosystems, European land management strategies frequently need more reliable data on environmental conditions governing this process. This study presents a methodology that integrates remote sensing and nuclear techniques for examining gully erosion (Đokić et al., 2023). It introduces a novel approach to erosion research by employing 360-degree camera photogrammetry to characterize gullies morphometrically. The main objectives of this approach are to evaluate the applicability of unmanned aerial vehicles and terrestrial photogrammetry for modeling gullies, to study small-scale erosion processes within gullies, compare erosion intensity between adjacent gullies, and determine the most effective and cost-efficient method for monitoring gullies. A total of 39 soil samples were taken in three studied gullies. The results revealed an average soil redistribution rate of 16.2 t ha−1 yr−1 and coefficients of variation of 32%, 59%, and 91% for the gullies. The estimated erosion rate varies from a minimum of 0.1 t ha−1 yr−1 to a maximum of 34.3 t ha−1 yr−1. Soil deposition was identified at only two sampling sites, 1.1 and 2 t ha−1 yr−1. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. The micro-relief obtained through modeling proved to be an essential aspect of advanced erosion research.
PB  - Belgrade : University,Faculty of Civil Engineering : University, Institute of Physics : SASA, Geographical Institute „Jovan Cvijić“
C3  - GeosciRA23 : International Conference
on Recent Trends in Geoscience Research and Applications : Book of abstracts
T1  - Utilization of remote sensing and nuclear techniques for detailed modeling and quantitative assessment of gully erosion within the forested area of the Malčanska river basin, eastern Serbia
SP  - 88
EP  - 89
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12343
ER  - 

@conference{
author = "Đokić, Mrđan and Manić, Miloš and Đorđević, Milan and Gocić, Milena and Čupić, Aleksandar and Jović, Mihajlo and Dragović, Ranko and Gajić, Boško and Smičiklas, Ivana and Dragović, Snežana",
year = "2023",
abstract = "The gully erosion is one of the most significant land degradation processes. Although gully erosion significantly threatens agricultural productivity and natural ecosystems, European land management strategies frequently need more reliable data on environmental conditions governing this process. This study presents a methodology that integrates remote sensing and nuclear techniques for examining gully erosion (Đokić et al., 2023). It introduces a novel approach to erosion research by employing 360-degree camera photogrammetry to characterize gullies morphometrically. The main objectives of this approach are to evaluate the applicability of unmanned aerial vehicles and terrestrial photogrammetry for modeling gullies, to study small-scale erosion processes within gullies, compare erosion intensity between adjacent gullies, and determine the most effective and cost-efficient method for monitoring gullies. A total of 39 soil samples were taken in three studied gullies. The results revealed an average soil redistribution rate of 16.2 t ha−1 yr−1 and coefficients of variation of 32%, 59%, and 91% for the gullies. The estimated erosion rate varies from a minimum of 0.1 t ha−1 yr−1 to a maximum of 34.3 t ha−1 yr−1. Soil deposition was identified at only two sampling sites, 1.1 and 2 t ha−1 yr−1. Highly detailed 3D models of the gullies were created using 360-degree photogrammetry. The micro-relief obtained through modeling proved to be an essential aspect of advanced erosion research.",
publisher = "Belgrade : University,Faculty of Civil Engineering : University, Institute of Physics : SASA, Geographical Institute „Jovan Cvijić“",
journal = "GeosciRA23 : International Conference
on Recent Trends in Geoscience Research and Applications : Book of abstracts",
title = "Utilization of remote sensing and nuclear techniques for detailed modeling and quantitative assessment of gully erosion within the forested area of the Malčanska river basin, eastern Serbia",
pages = "88-89",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12343"
}

Đokić, M., Manić, M., Đorđević, M., Gocić, M., Čupić, A., Jović, M., Dragović, R., Gajić, B., Smičiklas, I.,& Dragović, S.. (2023). Utilization of remote sensing and nuclear techniques for detailed modeling and quantitative assessment of gully erosion within the forested area of the Malčanska river basin, eastern Serbia. in GeosciRA23 : International Conference
on Recent Trends in Geoscience Research and Applications : Book of abstracts
Belgrade : University,Faculty of Civil Engineering : University, Institute of Physics : SASA, Geographical Institute „Jovan Cvijić“., 88-89.
https://hdl.handle.net/21.15107/rcub_vinar_12343

Đokić M, Manić M, Đorđević M, Gocić M, Čupić A, Jović M, Dragović R, Gajić B, Smičiklas I, Dragović S. Utilization of remote sensing and nuclear techniques for detailed modeling and quantitative assessment of gully erosion within the forested area of the Malčanska river basin, eastern Serbia. in GeosciRA23 : International Conference
on Recent Trends in Geoscience Research and Applications : Book of abstracts. 2023;:88-89.
https://hdl.handle.net/21.15107/rcub_vinar_12343 .

Đokić, Mrđan, Manić, Miloš, Đorđević, Milan, Gocić, Milena, Čupić, Aleksandar, Jović, Mihajlo, Dragović, Ranko, Gajić, Boško, Smičiklas, Ivana, Dragović, Snežana, "Utilization of remote sensing and nuclear techniques for detailed modeling and quantitative assessment of gully erosion within the forested area of the Malčanska river basin, eastern Serbia" in GeosciRA23 : International Conference
on Recent Trends in Geoscience Research and Applications : Book of abstracts (2023):88-89,
https://hdl.handle.net/21.15107/rcub_vinar_12343 .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Dragović, Snežana D.
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Đokić, Mrđan
AU  - Zlatković, Bojan
AU  - Walling, Desmond
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1091
AB  - The need for reliable assessments of soil erosion rates in Serbia has directed attention to the potential for using Cs-137 measurements to derive estimates of soil redistribution rates. Since, to date, this approach has not been applied in southeastern Serbia, a reconnaissance study was undertaken to confirm its viability. The need to take account of the occurrence of substantial Chernobyl fallout was seen as a potential problem. Samples for Cs-137 measurement were collected from a zone of uncultivated soils in the watersheds of Pcinja and South Morava Rivers, an area with known high soil erosion rates. Two theoretical conversion models, the profile distribution (PD) model and diffusion and migration (D and M) model were used to derive estimates of soil erosion and deposition rates from the Cs-137 measurements. The estimates of soil redistribution rates derived by using the PD and D and M models were found to differ substantially and this difference was ascribed to the assumptions of the simpler PD model that cause it to overestimate rates of soil loss. The results provided by the D and M model were judged to more reliable. (C) 2016 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Journal of Environmental Radioactivity
T1  - Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia
VL  - 158
SP  - 71
EP  - 80
DO  - 10.1016/j.jenvrad.2016.04.001
ER  - 

@article{
author = "Petrović, Jelena M. and Dragović, Snežana D. and Dragović, Ranko M. and Đorđević, Milan M. and Đokić, Mrđan and Zlatković, Bojan and Walling, Desmond",
year = "2016",
abstract = "The need for reliable assessments of soil erosion rates in Serbia has directed attention to the potential for using Cs-137 measurements to derive estimates of soil redistribution rates. Since, to date, this approach has not been applied in southeastern Serbia, a reconnaissance study was undertaken to confirm its viability. The need to take account of the occurrence of substantial Chernobyl fallout was seen as a potential problem. Samples for Cs-137 measurement were collected from a zone of uncultivated soils in the watersheds of Pcinja and South Morava Rivers, an area with known high soil erosion rates. Two theoretical conversion models, the profile distribution (PD) model and diffusion and migration (D and M) model were used to derive estimates of soil erosion and deposition rates from the Cs-137 measurements. The estimates of soil redistribution rates derived by using the PD and D and M models were found to differ substantially and this difference was ascribed to the assumptions of the simpler PD model that cause it to overestimate rates of soil loss. The results provided by the D and M model were judged to more reliable. (C) 2016 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Environmental Radioactivity",
title = "Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia",
volume = "158",
pages = "71-80",
doi = "10.1016/j.jenvrad.2016.04.001"
}

Petrović, J. M., Dragović, S. D., Dragović, R. M., Đorđević, M. M., Đokić, M., Zlatković, B.,& Walling, D.. (2016). Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia. in Journal of Environmental Radioactivity
Elsevier., 158, 71-80.
https://doi.org/10.1016/j.jenvrad.2016.04.001

Petrović JM, Dragović SD, Dragović RM, Đorđević MM, Đokić M, Zlatković B, Walling D. Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia. in Journal of Environmental Radioactivity. 2016;158:71-80.
doi:10.1016/j.jenvrad.2016.04.001 .

Petrović, Jelena M., Dragović, Snežana D., Dragović, Ranko M., Đorđević, Milan M., Đokić, Mrđan, Zlatković, Bojan, Walling, Desmond, "Using Cs-137 measurements to estimate soil erosion rates in the Pcinja and South Morava River Basins, southeastern Serbia" in Journal of Environmental Radioactivity, 158 (2016):71-80,
https://doi.org/10.1016/j.jenvrad.2016.04.001 . .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Dragović, Snežana D.
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Đokić, Mrđan
AU  - Ćujić, Mirjana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7098
AB  - The area of southeastern Serbia, the Pinja and South Morava River Basins, is under the influence of very strong erosion, and the aim of this study was to investigate the vertical and spatial distribution of the Cs-137 in the eroded soils of this area. Vertical soil profiles were collected with 5-cm increments from the uppermost layer down to 20, 25, 30, 40, and 50 cm of depth, depending on the thickness of the soil layers, i.e., down to the underlying parent rocks. Measurements of Cs-137 activity concentration were performed by using the HPGe gamma-ray spectrometer ORTEC-AMETEK (34 % relative efficiency and high resolution 1.65 keV at 1.33 MeV for Co-60), from its gamma-ray line at 661.2 keV. The mean Cs-137 activity concentration across all 18 soil profiles (for all soil layers) was found to be 20 Bq kg(-1). In the greatest number of soil profiles, the Cs-137 activity concentration was generally highest in the first soil layer (0-5 cm) and decreased with soil depth, while in a few soil profiles, the peak of either the Cs-137 activity concentration occurred in the second soil layer (5-10 cm) or the Cs-137 activity concentration was almost equal throughout the entire soil profile. The mean Cs-137 activity concentration in the first soil layer (0-5 cm) was found to be 61 Bq kg(-1), and the high coefficient of variation of 92 % pointed out high spatial variability and large range of the Cs-137 activity concentrations in the study area. The obtained results indicate that in the greatest number of soil profiles, Cs-137 is present in the upper layers, with concentration decreasing with depth, as is typical in uncultivated soil. Its spatial distribution was very uneven among the surface soil layers of the investigated sites. One of the main reasons for such pattern of Cs-137 in the study area may be soil erosion. Additional investigations which would support this hypothesis are required.
T2  - Journal of soils and sediments
T1  - Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)
VL  - 16
IS  - 4
SP  - 1168
EP  - 1175
DO  - 10.1007/s11368-015-1192-5
ER  - 

@article{
author = "Petrović, Jelena M. and Dragović, Snežana D. and Dragović, Ranko M. and Đorđević, Milan M. and Đokić, Mrđan and Ćujić, Mirjana",
year = "2016",
abstract = "The area of southeastern Serbia, the Pinja and South Morava River Basins, is under the influence of very strong erosion, and the aim of this study was to investigate the vertical and spatial distribution of the Cs-137 in the eroded soils of this area. Vertical soil profiles were collected with 5-cm increments from the uppermost layer down to 20, 25, 30, 40, and 50 cm of depth, depending on the thickness of the soil layers, i.e., down to the underlying parent rocks. Measurements of Cs-137 activity concentration were performed by using the HPGe gamma-ray spectrometer ORTEC-AMETEK (34 % relative efficiency and high resolution 1.65 keV at 1.33 MeV for Co-60), from its gamma-ray line at 661.2 keV. The mean Cs-137 activity concentration across all 18 soil profiles (for all soil layers) was found to be 20 Bq kg(-1). In the greatest number of soil profiles, the Cs-137 activity concentration was generally highest in the first soil layer (0-5 cm) and decreased with soil depth, while in a few soil profiles, the peak of either the Cs-137 activity concentration occurred in the second soil layer (5-10 cm) or the Cs-137 activity concentration was almost equal throughout the entire soil profile. The mean Cs-137 activity concentration in the first soil layer (0-5 cm) was found to be 61 Bq kg(-1), and the high coefficient of variation of 92 % pointed out high spatial variability and large range of the Cs-137 activity concentrations in the study area. The obtained results indicate that in the greatest number of soil profiles, Cs-137 is present in the upper layers, with concentration decreasing with depth, as is typical in uncultivated soil. Its spatial distribution was very uneven among the surface soil layers of the investigated sites. One of the main reasons for such pattern of Cs-137 in the study area may be soil erosion. Additional investigations which would support this hypothesis are required.",
journal = "Journal of soils and sediments",
title = "Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)",
volume = "16",
number = "4",
pages = "1168-1175",
doi = "10.1007/s11368-015-1192-5"
}

Petrović, J. M., Dragović, S. D., Dragović, R. M., Đorđević, M. M., Đokić, M.,& Ćujić, M.. (2016). Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins). in Journal of soils and sediments, 16(4), 1168-1175.
https://doi.org/10.1007/s11368-015-1192-5

Petrović JM, Dragović SD, Dragović RM, Đorđević MM, Đokić M, Ćujić M. Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins). in Journal of soils and sediments. 2016;16(4):1168-1175.
doi:10.1007/s11368-015-1192-5 .

Petrović, Jelena M., Dragović, Snežana D., Dragović, Ranko M., Đorđević, Milan M., Đokić, Mrđan, Ćujić, Mirjana, "Spatial and vertical distribution of Cs-137 in soils in the erosive area of southeastern Serbia (Pinja and South Morava River Basins)" in Journal of soils and sediments, 16, no. 4 (2016):1168-1175,
https://doi.org/10.1007/s11368-015-1192-5 . .

TY  - JOUR
AU  - Dragović, Snežana D.
AU  - Janković Mandić, Ljiljana
AU  - Dragović, Ranko M.
AU  - Đorđević, Milan M.
AU  - Đokić, Mrđan
AU  - Kovacevic, Jovan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6062
AB  - The survey results of concentrations of lithogenic radionuclides in surface soils from 213 locations in Serbia, their mutual concentration ratios and spatial distribution are presented. The mean concentrations of uranium, thorium and potassium in soils of 2.6 mg kg(-1), 9.3 mg kg(-1) and 1.8.10(4) mg kg(-1), respectively, were found to be similar with equivalent values reported for soils of regions with similar geological composition and geotectonic structures and also with worldwide average values. The spatial distribution of analyzed radionuclides was geostatistically interpolated using ordinary kriging. The spatial distribution maps of uranium, thorium and potassium concentrations showed their variability among different regions as a consequence of different lithological units of the investigated area. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Journal of Geochemical Exploration
T1  - Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations
VL  - 142
IS  - SI
SP  - 4
EP  - 10
DO  - 10.1016/j.gexplo.2013.07.015
ER  - 

@article{
author = "Dragović, Snežana D. and Janković Mandić, Ljiljana and Dragović, Ranko M. and Đorđević, Milan M. and Đokić, Mrđan and Kovacevic, Jovan",
year = "2014",
abstract = "The survey results of concentrations of lithogenic radionuclides in surface soils from 213 locations in Serbia, their mutual concentration ratios and spatial distribution are presented. The mean concentrations of uranium, thorium and potassium in soils of 2.6 mg kg(-1), 9.3 mg kg(-1) and 1.8.10(4) mg kg(-1), respectively, were found to be similar with equivalent values reported for soils of regions with similar geological composition and geotectonic structures and also with worldwide average values. The spatial distribution of analyzed radionuclides was geostatistically interpolated using ordinary kriging. The spatial distribution maps of uranium, thorium and potassium concentrations showed their variability among different regions as a consequence of different lithological units of the investigated area. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Journal of Geochemical Exploration",
title = "Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations",
volume = "142",
number = "SI",
pages = "4-10",
doi = "10.1016/j.gexplo.2013.07.015"
}

Dragović, S. D., Janković Mandić, L., Dragović, R. M., Đorđević, M. M., Đokić, M.,& Kovacevic, J.. (2014). Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations. in Journal of Geochemical Exploration, 142(SI), 4-10.
https://doi.org/10.1016/j.gexplo.2013.07.015

Dragović SD, Janković Mandić L, Dragović RM, Đorđević MM, Đokić M, Kovacevic J. Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations. in Journal of Geochemical Exploration. 2014;142(SI):4-10.
doi:10.1016/j.gexplo.2013.07.015 .

Dragović, Snežana D., Janković Mandić, Ljiljana, Dragović, Ranko M., Đorđević, Milan M., Đokić, Mrđan, Kovacevic, Jovan, "Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations" in Journal of Geochemical Exploration, 142, no. SI (2014):4-10,
https://doi.org/10.1016/j.gexplo.2013.07.015 . .