@article{DAN_1961_137_6_a23,
     author = {A. L. Polyakova},
     title = {Plane sound wave of finite amplitude in a moving medium},
     journal = {Doklady Akademii Nauk},
     pages = {1347--1349},
     publisher = {mathdoc},
     volume = {137},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_6_a23/}
}