MAMADALIEV, N. K. Tricomi problem for an elliptic-hyperbolic equation of the second kind. Eurasian Mathematical Journal, [S. l.], v. 5, n. 3, p. 80–92, 2014. Disponível em: https://emj.enu.kz/index.php/main/article/view/579. Acesso em: 20 aug. 2025.