Highly Efficient and Accurate Spectral Approximation of the Angular Mathieu Equation for any Parameter Values $q$. Journal of Mathematical Study, [S. l.], v. 51, n. 2, p. 131–149, 2018. DOI: 10.4208/jms.v51n2.18.02. Disponível em: https://www.global-sci.com/index.php/jms/article/view/13321. Acesso em: 5 dec. 2025.