@article{ZNSL_2001_281_a1,
     author = {N. A. Vavilov},
     title = {Subgroups of split orthogonal groups over a~commutative ring},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {35--59},
     year = {2001},
     volume = {281},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2001_281_a1/}
}