@article{KUKZ_1971_8_8_a7,
     author = {I. L. Gurevich},
     title = {Proof of the existence of a solution of a certain inverse mixed problem of gas dynamics},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {66--69},
     publisher = {mathdoc},
     volume = {8},
     number = {8},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1971_8_8_a7/}
}