@article{INTO_2020_180_a5,
     author = {S. V. Klepikova and O. P. Khromova},
     title = {On prescribed values of the operator of sectional curvature on three-dimensional locally homogeneous {Lorentzian} manifolds},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {41--49},
     publisher = {mathdoc},
     volume = {180},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2020_180_a5/}
}