Geodesic
On the tomographic study of boundaries of the Earth core
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 21, Tome 195 (1991), pp. 58-65 
P. V. Krauklis; G. Kovalle; L. A. Krauklis. On the tomographic study of boundaries of the Earth core. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 21, Tome 195 (1991), pp. 58-65. http://geodesic.mathdoc.fr/item/ZNSL_1991_195_a6/
@article{ZNSL_1991_195_a6,
     author = {P. V. Krauklis and G. Kovalle and L. A. Krauklis},
     title = {On the tomographic study of boundaries of the {Earth} core},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {58--65},
     year = {1991},
     volume = {195},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_195_a6/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

Some asymptotic formulae for the velocity and attenuation of waves propagating along mantle-core and outer core-inner core boundaries of Earth are presented. Whispering $SK_WS$, $KP_WK$ and creeping $K_C$ waves are considered.