ALDASHEV, S. A. Many-dimensional Dirichlet and Tricomi problems for one class of hyperbolic-elliptic equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 12, p. 1587–1593, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5162. Acesso em: 5 dec. 2025.