@article{GDZPPN00223338X,
title = {Unitary subgroup of integral groups rings.},
journal = {Manuscripta mathematica},
volume = {76},
year = {1992},
pages = {213-222},
zbl = {0779.16014},
url = {http://dml.mathdoc.fr/item/GDZPPN00223338X}
}
Sehgal, S.K.; Bovdi, A.A. Unitary subgroup of integral groups rings.. Manuscripta mathematica, Tome 76 (1992) pp. 213-222. http://gdmltest.u-ga.fr/item/GDZPPN00223338X/