@article{GDZPPN002333139,
title = {On subgroups of GL2 over non-commutative local rings which are normalized by elementary matrices.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {221-232},
zbl = {0662.20039},
url = {http://dml.mathdoc.fr/item/GDZPPN002333139}
}
Menal, Peral; Vaserstein, Leonid N. On subgroups of GL2 over non-commutative local rings which are normalized by elementary matrices.. Mathematische Annalen, Tome 283 (1989) pp. 221-232. http://gdmltest.u-ga.fr/item/GDZPPN002333139/