KOVALOVA, G., A. KALININ, T. KALININA, and O. NIKITENKO. “APPROXIMATE CONSTRUCTION OF GEODESIC LINES ON ROTATION SURFACES”. APPLIED QUESTIONS OF MATHEMATICAL MODELLING 3, no. 2.2 (October 6, 2020): 156-164. Accessed July 3, 2024. //ojs.kntu.net.ua/index.php/aqmm/article/view/45.