@article{MZM_1969_5_2_a10,
     author = {L. N. Vaserstein},
     title = {$K_1$-theory and the congruence problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {233--244},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_2_a10/}
}