Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1962__37_139260, author = {George W. Whitehead}, title = {Note on {Cross-sections} in {STIEFEL} {Manifolds.}}, journal = {Commentarii mathematici Helvetici}, pages = {239--240}, publisher = {mathdoc}, volume = {37}, year = {1962}, zbl = {0118.18702}, url = {http://geodesic.mathdoc.fr/item/CMH_1962__37_139260/} }
George W. Whitehead. Note on Cross-sections in STIEFEL Manifolds.. Commentarii mathematici Helvetici, Tome 37 (1962), pp. 239-240. http://geodesic.mathdoc.fr/item/CMH_1962__37_139260/