%0 Journal Article %A P. V. Krauklis %A N. A. Burago %T On the investigation of the dispersion equation for a~task of the borehole acoustics %J Zapiski Nauchnykh Seminarov POMI %D 1983 %P 89-94 %V 128 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a8/ %G ru %F ZNSL_1983_128_a8