@article{SM_1994_79_2_a0,
     author = {N. I. Dubrovin},
     title = {Rational closures of group rings of left-ordered groups},
     journal = {Sbornik. Mathematics},
     pages = {231--263},
     year = {1994},
     volume = {79},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_79_2_a0/}
}