@article{AA_1999_11_6_a7,
     author = {V. I. Chernousov and L. M. Timoshenko},
     title = {On the group of $R$-equivalence classes of semisimple groups over arithmetic fields},
     journal = {Algebra i analiz},
     pages = {191--221},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1999_11_6_a7/}
}