@article{ZNSL_1982_114_a13,
     author = {S. L. Krupetskii},
     title = {Normal structure of the unitary group over a local ring},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {150--163},
     publisher = {mathdoc},
     volume = {114},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1982_114_a13/}
}