DAVYDOV, V. F. Majorant estimates for solutions of quadratic difference systems with lag. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 4, p. 542–545, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5454. Acesso em: 5 dec. 2025.