@article{DAN_1975_223_2_a17,
     author = {R. S. Singatullin},
     title = {Invariant transformation of spaces of the general theory of relativity which are determined by a mapping of the trajectories of test particles},
     journal = {Doklady Akademii Nauk},
     pages = {325--327},
     publisher = {mathdoc},
     volume = {223},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_2_a17/}
}