%0 Journal Article %A V. A. Tupchiev %T Collapse of an arbitrary discontinuity for a system of two quasilinear first-order equations %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1964 %P 817-825 %V 4 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_5_a2/ %G ru %F ZVMMF_1964_4_5_a2