@article{GDZPPN002550199, title = {A functional equation for quadratic forms.}, journal = {Aequationes mathematicae}, volume = {20}, year = {1980}, pages = {1-7}, zbl = {0451.39008}, url = {http://dml.mathdoc.fr/item/GDZPPN002550199} }
Davison, T.M.K. A functional equation for quadratic forms.. Aequationes mathematicae, Tome 20 (1980) pp. 1-7. http://gdmltest.u-ga.fr/item/GDZPPN002550199/