@article{01678413, title = {Isotropy and factorization in reduced Witt rings.}, journal = {Documenta Mathematica}, volume = {6}, year = {2001}, pages = {141-163}, zbl = {0984.11020}, language = {en}, url = {http://dml.mathdoc.fr/item/01678413} }
Fitzgerald, Robert W. Isotropy and factorization in reduced Witt rings.. Documenta Mathematica, Tome 6 (2001) pp. 141-163. http://gdmltest.u-ga.fr/item/01678413/