KALITINE, Boris S. Stability of some differential equations of the fourth-order and fifth-order. Journal of the Belarusian State University. Mathematics and Informatics, [S. l.], n. 1, p. 18–27, 2019. DOI: 10.33581/2520-6508-2019-1-18-27. Disponível em: https://journals.bsu.by/index.php/mathematics/article/view/925. Acesso em: 17 jul. 2026.