VOROSHIK, N. I.; GORBAICHUK, V. I. Limit properties of the solutions of a Dirichlet problem in an elliptic domain. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 10, p. 1318–1327, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5533. Acesso em: 5 dec. 2025.