@article{1102992963, author = {Baumert, L. D.}, title = {Extreme copositive quadratic forms. II.}, journal = {Pacific J. Math.}, volume = {23}, number = {3}, year = {1967}, pages = { 1-20}, language = {en}, url = {http://dml.mathdoc.fr/item/1102992963} }
Baumert, L. D. Extreme copositive quadratic forms. II.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 1-20. http://gdmltest.u-ga.fr/item/1102992963/