@article{IVM_1963_5_a7,
     author = {V. R. Kaigorodov},
     title = {The classification of gravitational fields of general type in terms of the motion {groups.~V}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {51--55},
     year = {1963},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1963_5_a7/}
}