SAAD, N. On generalized Heun equation with some mathematical properties. Acta Polytechnica, [S. l.], v. 62, n. 1, p. 165–189, 2022. DOI: 10.14311/AP.2022.62.0165. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/7583. Acesso em: 19 may. 2024.