%0 Journal Article %A È. G. Shifrin %T A condition for the breakdown of the region of continuous supersonic %J Doklady Akademii Nauk %D 1967 %P 797-800 %V 176 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_176_4_a15/ %G ru %F DAN_1967_176_4_a15