@article{1077473867, author = {Richardson, A. R.}, title = {The composition of quadratic forms}, journal = {Duke Math. J.}, volume = {13}, number = {1}, year = {1946}, pages = { 587-600}, language = {en}, url = {http://dml.mathdoc.fr/item/1077473867} }
Richardson, A. R. The composition of quadratic forms. Duke Math. J., Tome 13 (1946) no. 1, pp. 587-600. http://gdmltest.u-ga.fr/item/1077473867/