%0 Journal Article %A P.J. Hilton %A J. Roitberg %T On the Classification Problem for H-Spaces of Rank Two. %J Commentarii mathematici Helvetici %D 1970 %P 506-516 %V 45 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1970__45_139453/ %F CMH_1970__45_139453