Fedorchuk, Vasyl, and Volodymyr Fedorchuk. “On Symmetry Reduction and Some Classes of Invariant Solutions of the (1+3)-Dimensional Homogeneous Monge-Ampère Equation”. Proceedings of the International Geometry Center 14, no. 3 (December 24, 2021): 206-218. Accessed June 27, 2026. https://journals.ontu.edu.ua/index.php/geometry/article/view/2078.