XU, L. He’s homotopy perturbation method for the temperature distribution in convective straight fins with temperature-dependent thermal conductivity. Topological Methods in Nonlinear Analysis, [S. l.], v. 31, n. 2, p. 253–261, 2008. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.016. Acesso em: 3 jul. 2024.