%0 Journal Article %A É. B. Bykhovskii %T Nonadmissible viscosity matrices for the equations of isothermal gas motion %J Doklady Akademii Nauk %D 1962 %P 751-753 %V 146 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_146_4_a2/ %G ru %F DAN_1962_146_4_a2