@article{DAN_1962_146_4_a2,
     author = {\'E. B. Bykhovskii},
     title = {Nonadmissible viscosity matrices for the equations of isothermal gas motion},
     journal = {Doklady Akademii Nauk},
     pages = {751--753},
     publisher = {mathdoc},
     volume = {146},
     number = {4},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_146_4_a2/}
}