%0 Journal Article %A A. F. Sidorov %T Exact solutions of triple-wave gas dynamics equations in a polytropic gas %J Doklady Akademii Nauk %D 1970 %P 782-785 %V 194 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_194_4_a11/ %G ru %F DAN_1970_194_4_a11