%0 Journal Article %A M. V. Losik %T Characteristic classes of structures on manifolds %J Funkcionalʹnyj analiz i ego priloženiâ %D 1987 %P 38-52 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1987_21_3_a3/ %G ru %F FAA_1987_21_3_a3