MATVIICHUK, K. S. On sufficient conditions for the technical stability of controlled processes with lumped parameters. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 10, p. 1352–1358, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4821. Acesso em: 5 dec. 2025.