%0 Journal Article %A S. G. Gindikin %T A generalization of parabolic differential operators to the case of multi-dimensional time %J Doklady Akademii Nauk %D 1967 %P 499-502 %V 173 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_173_3_a3/ %G ru %F DAN_1967_173_3_a3