@article{ZNSL_1997_239_a11,
     author = {V. D. Luk'yanov},
     title = {The application of the matrix {Riemann} problem to the investigation of normal waves excitation in an acoustic},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {129--132},
     year = {1997},
     volume = {239},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1997_239_a11/}
}