MAZKO, A. G. Cone inequalities and stability of differential systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 8, p. 1058–1074, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3224. Acesso em: 5 dec. 2025.