KALITINE, Boris S. Stability of solutions and the problem of Aizerman  for sixth-order differential equations. Journal of the Belarusian State University. Mathematics and Informatics, [S. l.], n. 2, p. 49–58, 2020. DOI: 10.33581/2520-6508-2020-2-49-58. Disponível em: https://journals.bsu.by/index.php/mathematics/article/view/3143. Acesso em: 19 jul. 2026.