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@article{DAN_1971_197_4_a18, author = {A. V. Aminova}, title = {On gravitational fields allowing groups of projective motions}, journal = {Doklady Akademii Nauk}, pages = {806--809}, publisher = {mathdoc}, volume = {197}, number = {4}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_197_4_a18/} }
A. V. Aminova. On gravitational fields allowing groups of projective motions. Doklady Akademii Nauk, Tome 197 (1971) no. 4, pp. 806-809. http://geodesic.mathdoc.fr/item/DAN_1971_197_4_a18/