@article{GDZPPN002092883, title = {Pairs of Quadratic Forms.}, journal = {Inventiones mathematicae}, volume = {34}, year = {1976}, pages = {157-164}, zbl = {0337.10015}, url = {http://dml.mathdoc.fr/item/GDZPPN002092883} }
Waterhouse, William C. Pairs of Quadratic Forms.. Inventiones mathematicae, Tome 34 (1976) pp. 157-164. http://gdmltest.u-ga.fr/item/GDZPPN002092883/