U. Filobello-Nino, “Classical Perturbation Method for the Solution of a Model of Diffusion and Reaction”, ASRJETS-Journal, vol. 27, no. 1, pp. 151–160, Jan. 2017, Accessed: Sep. 11, 2025. [Online]. Available: https://asrjetsjournal.org/American_Scientific_Journal/article/view/1357