@article{GDZPPN002056445, title = {On fibre spaces in which the fibre is contractible.}, journal = {Commentarii mathematici Helvetici}, volume = {29}, year = {1955}, pages = {1-8}, zbl = {0064.41601}, url = {http://dml.mathdoc.fr/item/GDZPPN002056445} }
Whitehead, J.H.C.; Spanier, E.H. On fibre spaces in which the fibre is contractible.. Commentarii mathematici Helvetici, Tome 29 (1955) pp. 1-8. http://gdmltest.u-ga.fr/item/GDZPPN002056445/