OLUTIMO, A. L. . Stability And Ultimate Boundedness Of Solutions Of A Certain Third Order Nonlinear Vector Differential Equation. Journal of the Nigerian Mathematical Society, [S. l.], v. 31, n. 1-3, p. 69–80, 2021. Disponível em: https://ojs.ictp.it/jnms/index.php/jnms/article/view/750. Acesso em: 20 apr. 2024.