Vyshenskaya О. V.; PERESTYUK , N. A. Integral sets of one class of breaking dynamic systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 5, p. 589–595, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7953. Acesso em: 6 dec. 2025.