@article{DAN_1969_185_3_a12,
     author = {E. V. Mamontov},
     title = {A note on unsteady near-sonic flows},
     journal = {Doklady Akademii Nauk},
     pages = {538--540},
     publisher = {mathdoc},
     volume = {185},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_3_a12/}
}