@article{1028999721, author = {Bott, Raoul}, title = {Vector fields and characteristic numbers.}, journal = {Michigan Math. J.}, volume = {14}, number = {1}, year = {1967}, pages = { 231-244}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999721} }
Bott, Raoul. Vector fields and characteristic numbers.. Michigan Math. J., Tome 14 (1967) no. 1, pp. 231-244. http://gdmltest.u-ga.fr/item/1028999721/