@article{ZNSL_1979_94_a8,
     author = {S. L. Krupetskii},
     title = {Subgroups of the unitary group over a local field},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {81--103},
     publisher = {mathdoc},
     volume = {94},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_94_a8/}
}