RYBALKINA, T. V.; SERGEYCHUK, V. V. Topological Classification of the Oriented Cycles of Linear Mappings. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 10, p. 1407–1413, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2231. Acesso em: 17 apr. 2025.