%0 Journal Article %A E. N. Zubov %T On double waves of the gasdynamic equations for three-dimensional nonstationary flows of an ideal gas with varying entropy %J Doklady Akademii Nauk %D 1982 %P 1087-1091 %V 263 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1982_263_5_a14/ %G ru %F DAN_1982_263_5_a14