Tafida, Fatima Umar. “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 11, no. 2 (July 26, 2025): 14. Accessed September 21, 2026. https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/866.