A Foundational Criterion in Boundary Value Problems for Pseudo-Differential Operators. European Journal of Emerging Engineering and Mathematics, [S. l.], v. 1, n. 01, p. 1–8, 2024. Disponível em: https://parthenonfrontiers.com/index.php/ejeemt/article/view/205. Acesso em: 15 jan. 2026.