Singularly Perturbed Renormalization Group Method and Its Significance in Dynamical Systems Theory. Communications in Mathematical Research, [S. l.], v. 38, n. 1, p. 99–122, 2021. DOI: 10.4208/cmr.2021-0049. Disponível em: https://global-sci.com/index.php/cmr/article/view/9068. Acesso em: 5 dec. 2025.