K. P. V. Preethi, M. Chitra Devi, R. Swaminathan, and R. Poovazhaki. 2018. “The New Homotopy Perturbation Method (NHPM) for Nonlinear Parabolic Equation in Chemical Sciences”. International Journal of Mathematics And Its Applications 6 (1 - B):359-67. http://ijmaa.in/index.php/ijmaa/article/view/933.