@article{02216474,
title = {Spin groups over a commutative ring and the associated root data (odd rank case).},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {46},
year = {2005},
pages = {377-395},
zbl = {1087.14031},
language = {en},
url = {http://dml.mathdoc.fr/item/02216474}
}
Ikai, Hisatoshi. Spin groups over a commutative ring and the associated root data (odd rank case).. Beiträge zur Algebra und Geometrie, Tome 46 (2005) pp. 377-395. http://gdmltest.u-ga.fr/item/02216474/