FILOBELLO-NINO, U. et al. Classical Perturbation Method for the Solution of a Model of Diffusion and Reaction. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 27, n. 1, p. 151–160, 2017. Disponível em: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1357. Acesso em: 9 oct. 2025.