@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/