Bouhassoun, Abdelkader, and Mohamed Zellal. “The Variational Homotopy Perturbation Method for Solving the K(2,2)equations”. International Journal of Applied Mathematical Research 2, no. 2 (May 23, 2013): 338–344. Accessed November 22, 2024. https://sciencepubco.com/index.php/ijamr/article/view/899.