@article{MAN_1973__200_162344,
     author = {David A. Hill},
     title = {Semi-Perfect {q-Rings.}},
     journal = {Mathematische Annalen},
     pages = {113--122},
     publisher = {mathdoc},
     volume = {200},
     year = {1973},
     zbl = {0234.16018},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__200_162344/}
}