@article{1102945281, author = {Nicholson, W. K.}, title = {Semiperfect rings with abelian group of units.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 191-198}, language = {en}, url = {http://dml.mathdoc.fr/item/1102945281} }
Nicholson, W. K. Semiperfect rings with abelian group of units.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 191-198. http://gdmltest.u-ga.fr/item/1102945281/