Ismoilov, A. I., Mamanazarov, A. O. and Urinov, A. K. (2017) “Darboux problem for the generalized Euler – Poisson – Darboux equation”, Ukrains’kyi Matematychnyi Zhurnal, 69(1), pp. 52-70. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1675 (Accessed: 20April2024).