@article{DAN_1977_233_2_a13,
     author = {M. A. Brodskii and A. L. Levshin},
     title = {Asymptotic method of the determination of velocity cross-section of the {Earth} according to its natural frequency},
     journal = {Doklady Akademii Nauk},
     pages = {312--315},
     publisher = {mathdoc},
     volume = {233},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_2_a13/}
}