%0 Journal Article %A D. V. Fomin %T Stiefel orientations: existence and constructions %J Zapiski Nauchnykh Seminarov POMI %D 1991 %P 149-160 %V 193 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1991_193_a9/ %G ru %F ZNSL_1991_193_a9