@article{00897858,
title = {Twisted Pfister forms.},
journal = {Documenta Mathematica},
volume = {1},
year = {1996},
pages = {67-102},
zbl = {0853.11027},
language = {en},
url = {http://dml.mathdoc.fr/item/00897858}
}
Hoffmann, Detlev W. Twisted Pfister forms.. Documenta Mathematica, Tome 1 (1996) pp. 67-102. http://gdmltest.u-ga.fr/item/00897858/