@article{1200691573, author = {Harada, Manabu}, title = {${\rm QF}-3$ and semi-primary ${\rm PP}$-rings. I, II}, journal = {Osaka J. Math.}, volume = {3}, number = {1}, year = {1966}, pages = { 21-27}, language = {en}, url = {http://dml.mathdoc.fr/item/1200691573} }
Harada, Manabu. ${\rm QF}-3$ and semi-primary ${\rm PP}$-rings. I, II. Osaka J. Math., Tome 3 (1966) no. 1, pp. 21-27. http://gdmltest.u-ga.fr/item/1200691573/