%0 Journal Article %A S. V. Khabirov %T Nonisentropic one-dimensional gas motions constructed by means of the contact group of the nonhomogeneous Monge--Amp\`ere equation %J Sbornik. Mathematics %D 1992 %P 447-462 %V 71 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1992_71_2_a11/ %G en %F SM_1992_71_2_a11