@article{DAN_1981_257_5_a18,
     author = {P. E. Krasnushkin},
     title = {Tomographic methods of the investigation of short wave propagation around the {Earth}},
     journal = {Doklady Akademii Nauk},
     pages = {1099--1102},
     publisher = {mathdoc},
     volume = {257},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_5_a18/}
}