Pylypaka S, Nesvidomin A. Construction of geodesic lines as boundary trajectorys of material particles movement on the surface. EIA [Internet]. 2022 Jun. 11 [cited 2026 Mar. 29];(2):94-100. Available from: https://journals.nubip.edu.ua/index.php/Energiya/article/view/energiya2022.02.094