@article{GDZPPN002412608,
title = {Quadratic Forms and the u-Invariant. I.},
journal = {Mathematische Zeitschrift},
volume = {135},
year = {1973},
pages = {283-304},
zbl = {0244.10020},
url = {http://dml.mathdoc.fr/item/GDZPPN002412608}
}
Elman, Richard; Lam, Tsit-Yuen. Quadratic Forms and the u-Invariant. I.. Mathematische Zeitschrift, Tome 135 (1973) pp. 283-304. http://gdmltest.u-ga.fr/item/GDZPPN002412608/