@article{GDZPPN00222318X,
title = {Group Rings with Units Torsion Over the Center.},
journal = {Manuscripta mathematica},
volume = {31},
year = {1980},
pages = {145-158},
zbl = {0449.20011},
url = {http://dml.mathdoc.fr/item/GDZPPN00222318X}
}
Sehgal, S.K.; Cliff, G.H. Group Rings with Units Torsion Over the Center.. Manuscripta mathematica, Tome 31 (1980) pp. 145-158. http://gdmltest.u-ga.fr/item/GDZPPN00222318X/