@article{GDZPPN002042495,
title = {On a superadditivity property of Gram's determinant.},
journal = {Aequationes mathematicae},
volume = {53},
year = {1997},
pages = {199-204},
zbl = {0890.26015},
url = {http://dml.mathdoc.fr/item/GDZPPN002042495}
}
Páles, Z.; Dragomir, S.S.; Mond, B. On a superadditivity property of Gram's determinant.. Aequationes mathematicae, Tome 53 (1997) pp. 199-204. http://gdmltest.u-ga.fr/item/GDZPPN002042495/