%0 Journal Article %A R. Bott %A H. Samelson %T On the Pontryagin product in spaces of paths. %J Commentarii mathematici Helvetici %D 1953 %P 320-337 %V 27 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1953__27_139067/ %F CMH_1953__27_139067