@article{DAN_1980_253_1_a16,
     author = {V. S. Geiko},
     title = {On uniqueness conditions of the travel-time curve determination of the seismic wave
},
     journal = {Doklady Akademii Nauk},
     pages = {74--78},
     publisher = {mathdoc},
     volume = {253},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_253_1_a16/}
}