@article{DAN_1987_293_6_a3,
     author = {A. V. Levichev},
     title = {The causal structure of a {Lorentzian} manifold determines its},
     journal = {Doklady Akademii Nauk},
     pages = {1301--1305},
     publisher = {mathdoc},
     volume = {293},
     number = {6},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a3/}
}