%0 Journal Article %A Yu. V. Sidorov %T The Cauchy problem for an equation of the first order with respect to time, with variable coefficients %J Doklady Akademii Nauk %D 1967 %P 1012-1014 %V 177 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_5_a6/ %G ru %F DAN_1967_177_5_a6