MAZKO, A. G. Positive and Monotone Systems in a Partially Ordered Space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 2, p. 164–173, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3898. Acesso em: 7 apr. 2025.