%0 Journal Article %A M. I. Vishik %T Solution of a system of quasilinear equations having divergence form, under periodic boundary conditions %J Doklady Akademii Nauk %D 1961 %P 502-505 %V 137 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_137_3_a2/ %G ru %F DAN_1961_137_3_a2