@article{MAT_1971_15_1_a2,
     author = {H. Bass and J. Milnor and J.-P. Serre},
     title = {Solution of the congruence subgroup problem for $\mathrm{SL}_n$ ($n\ge3$) and $\mathrm{Sp}_{2n}$ ($n\ge2$)},
     journal = {Matematika},
     pages = {44--60},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1971_15_1_a2/}
}