@article{GDZPPN002307103, title = {Semi-Perfect q-Rings.}, journal = {Mathematische Annalen}, volume = {201}, year = {1973}, pages = {113-122}, zbl = {0234.16018}, url = {http://dml.mathdoc.fr/item/GDZPPN002307103} }
Hill, David A. Semi-Perfect q-Rings.. Mathematische Annalen, Tome 201 (1973) pp. 113-122. http://gdmltest.u-ga.fr/item/GDZPPN002307103/