@article{VTGU_2007_1_a5,
     author = {G. G. Pestov and A. A. Tobolkin},
     title = {On the geometry of $n$-ordered groups},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {46--49},
     publisher = {mathdoc},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2007_1_a5/}
}