@article{GDZPPN002332353,
title = {The Quadratic Schur Subgroup over Local and Global Fields.},
journal = {Mathematische Annalen},
volume = {283},
year = {1989},
pages = {479-490},
zbl = {0642.12013},
url = {http://dml.mathdoc.fr/item/GDZPPN002332353}
}
Riehm, C. The Quadratic Schur Subgroup over Local and Global Fields.. Mathematische Annalen, Tome 283 (1989) pp. 479-490. http://gdmltest.u-ga.fr/item/GDZPPN002332353/