Asymptotic Solution of Singularly Pertubeted Problems withQuadratic Small Parameter. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 26, n. 1, p. 322–328, 2017. Disponível em: https://mail.journalofbabylon.com/index.php/JUBPAS/article/view/406. Acesso em: 4 aug. 2025.