@article{DAN_1995_344_5_a12,
     author = {E. A. Karabut},
     title = {A family of exact solutions that are close to gravitational waves},
     journal = {Doklady Akademii Nauk},
     pages = {623--626},
     year = {1995},
     volume = {344},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_344_5_a12/}
}