Solution of higher order ordinary differential equations by using Homotopy analysis method. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 4, n. 8, p. 100–106, 2017. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/4999. Acesso em: 10 sep. 2025.