@article{GDZPPN002303558,
title = {Adjoining a Unit to a Biregular Ring.},
journal = {Mathematische Annalen},
volume = {189},
year = {1970},
pages = {219-226},
zbl = {0191.03402},
url = {http://dml.mathdoc.fr/item/GDZPPN002303558}
}
VRABEC, J. Adjoining a Unit to a Biregular Ring.. Mathematische Annalen, Tome 189 (1970) pp. 219-226. http://gdmltest.u-ga.fr/item/GDZPPN002303558/