%0 Journal Article %A S. G. Gindikin %T Correctness classes of the Cauchy problem for differential equations with variable coefficients %J Funkcionalʹnyj analiz i ego priloženiâ %D 1970 %P 83-84 %V 4 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1970_4_2_a11/ %G ru %F FAA_1970_4_2_a11