%0 Journal Article %A V. I. Ruderfer %T A priori estimates for the solution of the Cauchy problem for a partial differential equation and a system of such equations with coefficients which are nonanalytic in the distinguished variable %J Doklady Akademii Nauk %D 1978 %P 782-785 %V 240 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1978_240_4_a6/ %G ru %F DAN_1978_240_4_a6