@article{ZNSL_1983_128_a11,
     author = {L. A. Molotkov and N. A. Razumovskii},
     title = {On the matrix method for slightly heterogeneous layered acoustical media},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {105--115},
     publisher = {mathdoc},
     volume = {128},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a11/}
}