%0 Journal Article %A A. Rapinchuk %T The congruence subgroup problem for algebraic groups %J Banach Center Publications %D 1990 %P 399-410 %V 26 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/-26-2-399-410/ %R 10.4064/-26-2-399-410 %G en %F 10_4064__26_2_399_410