@article{DAN_1963_149_2_a19,
     author = {V. V. Lokhin},
     title = {A system of defining parameters characterizing the geometrical properties of an anisotropic medium},
     journal = {Doklady Akademii Nauk},
     pages = {295--297},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_2_a19/}
}