@article{ISU_2020_20_1_a2,
     author = {N. P. Mozhey},
     title = {On the geometry of three-dimensional {pseudo-Riemannian} homogeneous {spaces.~I}},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {29--41},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2020_20_1_a2/}
}