%0 Journal Article %A K. B. Sabitov %T On the spectrum of a gasdynamic problem of Frankl' for equations of mixed type %J Doklady Akademii Nauk %D 1991 %P 40-44 %V 316 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1991_316_1_a8/ %G ru %F DAN_1991_316_1_a8