The Homotopy Perturbation Renormalization Group Method to Solve the WKB Problem with Turn Points. Communications in Mathematical Research, [S. l.], v. 35, n. 4, p. 377–382, 2019. DOI: 10.13447/j.1674-5647.2019.04.10. Disponível em: https://www.global-sci.com/index.php/cmr/article/view/9019. Acesso em: 6 dec. 2025.