MANGALAGOWRI.R. A Twin Result on Positive Solutions for Boundary Value Problems. International Journal of Engineering and Management Research, [S. l.], v. 7, n. 1, p. 430–438, 2017. Disponível em: https://ijemr.vandanapublications.com/index.php/ijemr/article/view/698. Acesso em: 3 jul. 2024.