%0 Journal Article %A L. A. Molotkov %A U. Baimagambetov %T On the investigation of the roots of dispersion equation for layered transversal-isotropic medium %J Zapiski Nauchnykh Seminarov POMI %D 1980 %P 104-122 %V 99 %U http://geodesic.mathdoc.fr/item/ZNSL_1980_99_a9/ %G ru %F ZNSL_1980_99_a9