On the Non-trivial Solvability of Boundary Value Problems in the Angle Domains. Journal of Partial Differential Equations, [S. l.], v. 23, n. 3, p. 235–250, 2010. DOI: 10.4208/jpde.v23.n3.3. Disponível em: https://global-sci.com/index.php/jpde/article/view/4166. Acesso em: 6 dec. 2025.