@article{2325,
author = {Kleinfeld, Erwin},
title = {Rings of $(\gamma ,\delta )$ type},
journal = {Portugaliae mathematica},
volume = {18},
year = {1959},
pages = {107-110},
zbl = {0090.02402},
mrnumber = {0110738},
language = {en},
url = {http://dml.mathdoc.fr/item/2325}
}
Kleinfeld, Erwin. Rings of $(\gamma ,\delta )$ type. Portugaliae mathematica, Tome 18 (1959) pp. 107-110. http://gdmltest.u-ga.fr/item/2325/