Inverse problem for a system of mixed-type second-order partial differential equations. Uzbek Mathematical Journal, [S. l.], v. 70, n. 2, p. 59–67, 2026. DOI: 10.29229/uzmj.2026-2-7. Disponível em: https://uzmj.mathinst.uz/index.php/uzmj/article/view/399.. Acesso em: 13 jun. 2026.