Sulakova, Lubova, and Janis Kaminskis. “The Reduction of Geomagnetic Data for the Territory of Latvia to the Epoch 2021.5”. Geodesy and Cartography 50, no. 1 (April 12, 2024): 30–34. Accessed July 7, 2024. https://jau.vgtu.lt/index.php/GAC/article/view/20996.