@article{IVM_1987_12_a13,
     author = {A. V. Aminova},
     title = {Projective-group symmetries of {Friedmann} universes and of their multidimensional generalizations--symmetries of ordinary $h$-spaces of type $\{1(1\dots 1)\}$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {66--68},
     publisher = {mathdoc},
     number = {12},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_12_a13/}
}