ALDASHEV, S. A. On the well-posedness of derichlet problems for the many-dimensional wave equation and lavrent’ev-bitsadze equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 5, p. 702–706, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5303. Acesso em: 27 apr. 2025.