Petroškevičius, Petras, and Romuald Obuchovski. “Investigation of Possibilities for Astronomical Meridian Determination by the Hour Angle of the Sun”. Geodesy and Cartography 32, no. 1 (August 3, 2012): 23-28. Accessed November 25, 2024. https://gc.vgtu.lt/index.php/GAC/article/view/10959.