Ryskan А.Р., Z.O. Arzikulov, and T.G. Ergashev. “Particular Solutions of Multidimensional Generalized Euler-Poisson-Darboux Equations of Elliptic- Hyperbolic Type”. Journal of Mathematics, Mechanics and Computer Science 121, no. 1 (April 5, 2024): 76–88. Accessed November 21, 2024. https://bm.kaznu.kz/index.php/kaznu/article/view/1364.