Homology Invariant Functions for Lane-Emden Equation of Finite Polytropic Index. Global Journal of Science Frontier Research, [S. l.], v. 12, n. F13, p. 31–38, 2012. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/681. Acesso em: 24 sep. 2026.