Jivall, Lotti, Jānis Kaminskis, and Eimuntas Paršeliūnas. “Improvement and Extension of ETRS 89 in Latvia and Lithuania Based on the NKG 2003 GPS Campaign”. Geodesy and Cartography 33, no. 1 (August 3, 2012): 13-20. Accessed January 9, 2025. https://jest.vgtu.lt/index.php/GAC/article/view/10927.