@article{ZNSL_1982_116_a9,
     author = {S. L. Krupetskii},
     title = {Intermediate subgroups in the unitary group over the skew field of quaternions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {96--101},
     publisher = {mathdoc},
     volume = {116},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1982_116_a9/}
}