@article{DAN_1989_304_3_a16,
     author = {V. G. Yakhno},
     title = {A multidimensional inverse dynamic problem of isotropic},
     journal = {Doklady Akademii Nauk},
     pages = {582--585},
     publisher = {mathdoc},
     volume = {304},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_3_a16/}
}