%0 Journal Article %A Yu. V. Sidorov %T The Cauchy problem for equations of the first order with respect to time and with two independent variables %J Sbornik. Mathematics %D 1968 %P 147-158 %V 5 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1968_5_2_a0/ %G en %F SM_1968_5_2_a0