Balodis, Janis, Katerina Morozova, Gunars Silabriedis, Maris Kalinka, Kriss Balodis, Ingus Mitrofanovs, Irina Baltmane, and Izolde Jumare. “Changing the National Height System and GEOID Model in Latvia”. Geodesy and Cartography 42, no. 1 (April 8, 2016): 20-24. Accessed February 23, 2025. https://jau.vgtu.lt/index.php/GAC/article/view/2502.