@article{01248239, title = {Generalized Gram-Hadamard inequality.}, journal = {Journal of Inequalities and Applications [electronic only]}, volume = {2}, year = {1998}, pages = {381-386}, doi = {10.1155/S1025583498000241}, zbl = {0924.47003}, language = {en}, url = {http://dml.mathdoc.fr/item/01248239} }
Constantinescu, Florin; Scharf, Günter. Generalized Gram-Hadamard inequality.. Journal of Inequalities and Applications [electronic only], Tome 2 (1998) pp. 381-386. doi : 10.1155/S1025583498000241. http://gdmltest.u-ga.fr/item/01248239/