S. NASSER, Mohamed M. Boundary Integral Equations with the Generalized Neumann Kernel for the Neumann Problem. MATEMATIKA, [S. l.], v. 23, p. 83–98, 2007. DOI: 10.11113/matematika.v23.n.525. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/525. Acesso em: 3 may. 2024.