%0 Journal Article %A S. N. Kruzhkov %T On solutions of first order nonlinear equations %J Doklady Akademii Nauk %D 1966 %P 286-289 %V 167 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1966_167_2_a8/ %G ru %F DAN_1966_167_2_a8