@article{05912028,
title = {Intermediate subgroups of the Steinberg groups over the field of fractions of a principal ideal ring.},
journal = {Vladikavkazski\u\i\ Matematicheski\u\i\ Zhurnal},
volume = {12},
year = {2010},
pages = {60-66},
zbl = {1218.20032},
language = {en},
url = {http://dml.mathdoc.fr/item/05912028}
}
Moiseenkova, T.V.; Nuzhin, Ya.N. Intermediate subgroups of the Steinberg groups over the field of fractions of a principal ideal ring.. Vladikavkazskiĭ Matematicheskiĭ Zhurnal, Tome 12 (2010) pp. 60-66. http://gdmltest.u-ga.fr/item/05912028/