@ARTICLE{
author={Krstic Stefan,Todorovic-Drakul Miljana,Grekulovic Sanja M,Petkovic Dusan S,Odalovic Oleg R},
year={2025},
title={Comparison of Total Electron Content Sources Over Europe During Solar Minimum and Maximum Years (2020 and 2024)},
journal={GEODETSKI VESTNIK},
volume={69},
number={4},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Petkovic Dusan S,Odalovic Oleg R,Nina Aleksandra M,Todorovic-Drakul Miljana,Kolarski Aleksandra B,Grekulovic Sanja M,Krstic Stefan},
year={2025},
title={Development of High-Precision Local and Regional Ionospheric Models Based on Spherical Harmonic Expansion and Global Navigation Satellite System Data in Serbia},
journal={ATMOSPHERE},
volume={16},
number={5},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Odalovic Oleg R,Petkovic Dusan S,Grekulovic Sanja M,Todorovic-Drakul Miljana},
year={2024},
title={A Compliance Assessment of Gnss Station Networks in Serbia},
journal={JOURNAL OF THE GEOGRAPHICAL INSTITUTE JOVAN CVIJIC SASA},
volume={74},
number={1},
pages={47-61},
document_type={Article},
} 

@ARTICLE{
author={Petkovic Dusan S,Odalovic Oleg R,Nina Aleksandra M},
year={2022},
title={Influence of the solar hydrogen Ly alpha line on the GNSS signal delay in the ionospheric D-region},
journal={CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO},
volume={52},
number={3},
pages={116-125},
document_type={Article},
}