K. P. V. Preethi, M. Chitra Devi, R. Swaminathan, and R. Poovazhaki. “The New Homotopy Perturbation Method (NHPM) for Nonlinear Parabolic Equation in Chemical Sciences”. International Journal of Mathematics And its Applications 6, no. 1 - B (January 20, 2018): 359–367. Accessed May 8, 2024. http://ijmaa.in/index.php/ijmaa/article/view/933.