@article{ZNSL_1972_25_a7,
     author = {L. A. Molotkov},
     title = {On the matric representions of the dispersion equation for layer-elastic media},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {116--131},
     publisher = {mathdoc},
     volume = {25},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1972_25_a7/}
}