KOVALEV, A. M. Partial stability and stabilization of dynamical systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 2, p. 186–193, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5403. Acesso em: 11 apr. 2025.