@article{1200692044,
author = {Colby, Robert R. and Rutter, Jr., Edgar A.},
title = {Semi-perfect ${\rm QF}$-3 and ${\rm PP}$-rings},
journal = {Osaka J. Math.},
volume = {5},
number = {1},
year = {1968},
pages = { 99-102},
language = {en},
url = {http://dml.mathdoc.fr/item/1200692044}
}
Colby, Robert R.; Rutter, Jr., Edgar A. Semi-perfect ${\rm QF}$-3 and ${\rm PP}$-rings. Osaka J. Math., Tome 5 (1968) no. 1, pp. 99-102. http://gdmltest.u-ga.fr/item/1200692044/