@article{DAN_1977_233_1_a19,
     author = {M. K. Polshkov and A. K. Urupov and A. V. Nevinnyi and V. A. Nevinnyi and V. S. Nitievskii},
     title = {Determination of the velocity field parameters in three-dimensional multilayer media with curvilinear boundaries},
     journal = {Doklady Akademii Nauk},
     pages = {78--80},
     publisher = {mathdoc},
     volume = {233},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_1_a19/}
}