@article{ZNSL_1983_132_a11,
     author = {I. Z. Golubchik and A. V. Mikhalev},
     title = {Isomorphism of unitary groups over associative rings},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {97--109},
     publisher = {mathdoc},
     volume = {132},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_132_a11/}
}