@article{SM_2016_207_9_a1,
     author = {V. N. Berestovskii and I. A. Zubareva},
     title = {Locally isometric coverings of the {Lie} group $\mathrm{SO}_0(2,1)$ with special {sub-Riemannian} metric},
     journal = {Sbornik. Mathematics},
     pages = {1215--1235},
     publisher = {mathdoc},
     volume = {207},
     number = {9},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2016_207_9_a1/}
}