TAFIDA, F. U. . A New Method for the Direct Solution of Second, Third and Fourth Order Differential Equations with Oscillatory Behavior. International Journal of Science for Global Sustainability, [S. l.], v. 11, n. 2, p. 14, 2025. DOI: 10.57233/ijsgs.v10i1.866. Disponível em: https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/866. Acesso em: 7 aug. 2026.