KASIRENKO, T. M.; MURACH, A. A. Elliptic problems with boundary conditions of higher orders in Hörmander spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 11, p. 1486–1504, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1797. Acesso em: 14 apr. 2025.