Abele, Māris, Jānis Balodis, Inese Janpaule, Ieva Lasmane, Augusts Rubans, and Ansis Zariņš. “Digital Zenith Camera for Vertical Deflection Determination”. Geodesy and Cartography 38, no. 4 (December 21, 2012): 123-129. Accessed December 2, 2024. https://ijspm.vgtu.lt/index.php/GAC/article/view/4756.