@article{DAN_1984_274_6_a16,
     author = {L. Sh. Grigoryan and G. S. Sahakyan},
     title = {On gravitational vacuum},
     journal = {Doklady Akademii Nauk},
     pages = {1352--1357},
     publisher = {mathdoc},
     volume = {274},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_274_6_a16/}
}