%0 Journal Article %A I. Kolář %T Natural bundles and operators %J Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara %D 1991 %P 67-98 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTG_1991_23_a2/ %G ru %F INTG_1991_23_a2