ISMOILOV, A. I.; MAMANAZAROV, A. O.; URINOV, A. K. Darboux problem for the generalized Euler – Poisson – Darboux equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 1, p. 52–70, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1675. Acesso em: 6 dec. 2025.