@article{DAN_1995_340_5_a6,
     author = {V. A. Sharafutdinov},
     title = {Exponential ray transformation on a {Riemannian} manifold},
     journal = {Doklady Akademii Nauk},
     pages = {600--601},
     year = {1995},
     volume = {340},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_340_5_a6/}
}