RAMI AL-AHMAD; M. AL-JARARHA; H. AL MEFLEH. Exactness of Second Order Ordinary Differential Equations and Integrating Factors. Jordan Journal of Mathematics and Statistics, [S. l.], v. 8, n. 2, p. 155–167, 2025. Disponível em: https://jjms.yu.edu.jo/index.php/jjms/article/view/1064. Acesso em: 1 jun. 2025.