%0 Journal Article %A V. P. Platonov %A A. S. Rapinchuk %T Abstract properties of $S$-arithmetic groups and the congruence s problem %J Izvestiya. Mathematics %D 1993 %P 455-476 %V 40 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1993_40_3_a0/ %G en %F IM2_1993_40_3_a0