@article{MT_1992_21_a7,
     author = {A. V. Levichev},
     title = {Three totally distorted homogeneous {Lorentzian} spaces},
     journal = {Matemati\v{c}eskie trudy},
     pages = {122--131},
     publisher = {mathdoc},
     volume = {21},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1992_21_a7/}
}