@article{ZNSL_1989_179_a6,
     author = {N. S. Grigorieva},
     title = {The conservation law of energy in acoustics of a stationary inhomogeneous moving medium},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--57},
     year = {1989},
     volume = {179},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1989_179_a6/}
}