BONDAR', O. P. Bott functions and the euler characteristic. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 10, p. 1431–1432, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4743. Acesso em: 11 apr. 2025.