BONDAR', O. P. Generalized (CO)Homology length of a Manifold and functions with Singular Submanifolds. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 6, p. 843–846, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5284. Acesso em: 5 dec. 2025.