K. RAVI; R. MURALI; A. PONMANASELVAN; R. VEERASIVSJI. Hyers-Ulam Stability of $n^{th}$ Order Non-Linear Differential Equations with Initial Conditions. International Journal of Mathematics And its Applications, [S. l.], v. 4, n. 2 - C, p. 121–132, 2016. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1053. Acesso em: 22 sep. 2025.