@article{1028999313, author = {Hirsch, Morris W.}, title = {On the fibre homotopy type of normal bundles.}, journal = {Michigan Math. J.}, volume = {12}, number = {1}, year = {1965}, pages = { 225-229}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999313} }
Hirsch, Morris W. On the fibre homotopy type of normal bundles.. Michigan Math. J., Tome 12 (1965) no. 1, pp. 225-229. http://gdmltest.u-ga.fr/item/1028999313/