Kiosak, V., A. Savchenko, and O. Latysh. “Geodesic Mappings of Compact Quasi-Einstein Spaces, II”. Proceedings of the International Geometry Center 14, no. 1 (May 16, 2021): 81-92. Accessed June 28, 2026. https://journals.ontu.edu.ua/index.php/geometry/article/view/1936.