GALLARDO, L.H. On the index of special perfect polynomials. Carpathian Mathematical Publications, [S. l.], v. 15, n. 2, p. 507–513, 2023. DOI: 10.15330/cmp.15.2.507-513. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/5452. Acesso em: 11 may. 2024.