SHIBU MANUEL; K. S. NEERAJA; RANI JOSE. Relation between Luhn Algorithm and Level sets. International Journal of Mathematics And its Applications, [S. l.], v. 13, n. 3, p. 91–94, 2025. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1598. Acesso em: 15 sep. 2025.