@article{GDZPPN002065576,
title = {L'invariant de Witt de la forme Tr(x2).},
journal = {Commentarii mathematici Helvetici},
volume = {59},
year = {1984},
pages = {651-676},
zbl = {0565.12014},
url = {http://dml.mathdoc.fr/item/GDZPPN002065576}
}
Serre, Jean-Pierre. L'invariant de Witt de la forme Tr(x2).. Commentarii mathematici Helvetici, Tome 59 (1984) pp. 651-676. http://gdmltest.u-ga.fr/item/GDZPPN002065576/