Ostapchuk, Serhii, Roman Nimkovych, Andrii Prokopchuk, and Oksana Ostapchuk. 2026. “Geographical Centers of Administrative-Territorial Entities of The  Rivne Region of Ukraine: Essence, Significance and Peculiarities Of  Definition”. Geodesy and Cartography 52 (2): 66–73. https://doi.org/10.3846/gac.2026.22210.