Jassim, Abeer Majeed, Elaf Jaafar Ali, and Afrah Abd-Imam Ahmed. 2013. “A New Procedure of Initial Boundary Value Problems Using Homotopy Perturbation Method”. Journal of Kufa for Mathematics and Computer 1 (7):54-62. https://doi.org/10.31642/JoKMC/2018/010708.