@article{DAN_1965_163_6_a20,
     author = {M. L. Gerver and V. M. Markushevich},
     title = {Investigation of ambiguity in the determination of a seismic wave velocity by its travel-time curve},
     journal = {Doklady Akademii Nauk},
     pages = {1377--1380},
     publisher = {mathdoc},
     volume = {163},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_163_6_a20/}
}