@article{GDZPPN002090597, title = {Quadratic Forms and the ?-Invariant. II.}, journal = {Inventiones mathematicae}, volume = {20}, year = {1973}, pages = {125-138}, zbl = {0267.10029}, url = {http://dml.mathdoc.fr/item/GDZPPN002090597} }
Elman, Richard; Lam, T.Y. Quadratic Forms and the ?-Invariant. II.. Inventiones mathematicae, Tome 20 (1973) pp. 125-138. http://gdmltest.u-ga.fr/item/GDZPPN002090597/