POPOVA, N. D.; STRILETS, O. V. Criteria for the existence of systems of subspaces related to a certain class of unicyclic graphs. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 4, p. 556–565, 2021. DOI: 10.37863/umzh.v73i4.6354. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6354. Acesso em: 11 apr. 2025.