ORTIZ FERNÁNDEZ, Alejandro. Señales y ondaletes. Pro Mathematica, [S. l.], v. 7, n. 13-14, p. 9–69, 1993. Disponível em: https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10150. Acesso em: 12 dic. 2025.