1.
Uddin MA, Sattar MA. Second Approximate Solution of Duffing Equation with Strong Nonlinearity by Homotopy Perturbation Method. GANIT: J. Bangladesh Math. Soc. [Internet]. 2011 Aug. 31 [cited 2024 Jul. 27];30:59-75. Available from: https://banglajol.info/index.php/GANIT/article/view/8504