AMMAR, Boukhemis. On the classical 2−orthogonal polynomials sequences of Sheffer-Meixner type. CUBO, A Mathematical Journal, [S. l.], v. 7, n. 2, p. 39–55, 2005. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1541. Acesso em: 12 oct. 2025.