MAZKO, A. G. Localization of spectrum and stability of certain classes of dynamical systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 8, p. 1074–1079, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5250. Acesso em: 6 dec. 2025.