%0 Journal Article %A Wolfgang Walter %T Parabolic Differential Equations and Inequalities with Several Time Variables. %J Mathematische Zeitschrift %D 1986 %P 319-324 %V 191 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1986__191_173677/ %F MZ_1986__191_173677