@article{GDZPPN002428091, title = {Idempotents in Group Rings.}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {19-28}, zbl = {0513.16009}, url = {http://dml.mathdoc.fr/item/GDZPPN002428091} }
Marciniak, Zbigniew S. Idempotents in Group Rings.. Mathematische Zeitschrift, Tome 183 (1983) pp. 19-28. http://gdmltest.u-ga.fr/item/GDZPPN002428091/