Filobello-Nino U, Vazquez-Leal H, Perez-Sesma JAA, et al. Classical Perturbation Method for the Solution of a Model of Diffusion and Reaction. ASRJETS-Journal. 2017;27(1):151-160. Accessed October 9, 2025. https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1357