%0 Journal Article %A V. V. Vagner %T On Ehresmann's theory of jets %J Doklady Akademii Nauk %D 1963 %P 17-19 %V 152 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a2/ %G ru %F DAN_1963_152_1_a2