STANZHITSKII, A. N. Investigation of invariant sets with random perturbations with the use of the Lyapunov function. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 2, p. 309–312, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4965. Acesso em: 5 dec. 2025.