@article{IM2_1980_14_3_a2,
     author = {V. P. Platonov and A. A. Bondarenko and A. S. Rapinchuk},
     title = {Class numbers and groups of algebraic groups},
     journal = {Izvestiya. Mathematics },
     pages = {547--569},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_14_3_a2/}
}