@article{GDZPPN002427281, title = {Idempotente Multiplikationen.}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {95-120}, zbl = {0505.55011}, url = {http://dml.mathdoc.fr/item/GDZPPN002427281} }
Strambach, Karl; Scheerer, Hans. Idempotente Multiplikationen.. Mathematische Zeitschrift, Tome 183 (1983) pp. 95-120. http://gdmltest.u-ga.fr/item/GDZPPN002427281/