On a coefficient inverse problem with nonlocal boundary conditions of periodic type for the three-dimensional Tricomi equation in a parallelepiped. Uzbek Mathematical Journal, [S. l.], v. 70, n. 1, p. 34–48, 2026. DOI: 10.29229/uzmj.2026-1-4. Disponível em: https://uzmj.mathinst.uz/index.php/uzmj/article/view/278.. Acesso em: 26 mar. 2026.