%0 Journal Article %A V. V. Vishnevskii %T Norden's concomitant structures, and their generalizations %J Trudy Geometricheskogo Seminara %D 1974 %P 28-35 %V 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUTGS_1974_7_a3/ %G ru %F KUTGS_1974_7_a3