@article{10_4064__26_2_399_410,
     author = {A. Rapinchuk},
     title = {The congruence subgroup problem for algebraic groups},
     journal = {Banach Center Publications},
     pages = {399--410},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1990},
     doi = {10.4064/-26-2-399-410},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-26-2-399-410/}
}