@article{ZNSL_1983_128_a8,
     author = {P. V. Krauklis and N. A. Burago},
     title = {On the investigation of the dispersion equation for a~task of the borehole acoustics},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {89--94},
     publisher = {mathdoc},
     volume = {128},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a8/}
}