%0 Journal Article %A L. S. Frank %T Difference methods for solving the improper Cauchy problem simulating flow of a perfect gas through a nozzle %J Doklady Akademii Nauk %D 1968 %P 526-529 %V 182 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_182_3_a9/ %G ru %F DAN_1968_182_3_a9