@article{GDZPPN002206773,
title = {A classification of rank 6 quadratic spaces via pfaffians.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {187-218},
zbl = {0664.10008},
url = {http://dml.mathdoc.fr/item/GDZPPN002206773}
}
Sridharan, R.; Knus, M.-A.; Parimala, R. A classification of rank 6 quadratic spaces via pfaffians.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 187-218. http://gdmltest.u-ga.fr/item/GDZPPN002206773/