%0 Journal Article %A A. S. Schwarz %T Some notions connected with that of the genus of a fibre space %J Doklady Akademii Nauk %D 1961 %P 301-303 %V 136 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_136_2_a11/ %G ru %F DAN_1961_136_2_a11