@article{IVM_1985_1_a13,
     author = {G. G. Ivanov},
     title = {Imbedding of space-time with isometric and conformal motions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {61--63},
     publisher = {mathdoc},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1985_1_a13/}
}