M. PRADEEP; S. BALA. Solution of the Second Order Cauchy Difference Equation On Free Monoid. Journal of Computational Analysis and Applications (JoCAAA), [S. l.], v. 33, n. 05, p. 60–66, 2024. Disponível em: http://eudoxuspress.com/index.php/pub/article/view/441. Acesso em: 20 oct. 2024.