@article{GDZPPN002395568,
title = {The multiplicative groups of a ring.},
journal = {Mathematische Zeitschrift},
volume = {87},
year = {1965},
pages = {378-384},
zbl = {0138.26803},
url = {http://dml.mathdoc.fr/item/GDZPPN002395568}
}
Farahat, H.K. The multiplicative groups of a ring.. Mathematische Zeitschrift, Tome 87 (1965) pp. 378-384. http://gdmltest.u-ga.fr/item/GDZPPN002395568/