MOHAMMED ELNAGI M. ELSANOSI. Second-Order Boundary Value Problem With Set of the Associated Green’s Function May Have Zeros. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 4 - C, p. 371–376, 2017. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/1282. Acesso em: 20 may. 2024.