XUE, Jianming. HYERS-ULAM STABILITY OF LINEAR DIFFERENTIAL EQUATIONS OF SECOND ORDER WITH CONSTANT COEFFICIENT. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 32, p. 419–424, 2014. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6195. Acesso em: 26 jul. 2026.