@article{GDZPPN002402599,
title = {On the Hammard Product.},
journal = {Mathematische Zeitschrift},
volume = {105},
year = {1968},
pages = {365-366},
zbl = {0162.04204},
url = {http://dml.mathdoc.fr/item/GDZPPN002402599}
}
Ballantine, Charles S. On the Hammard Product.. Mathematische Zeitschrift, Tome 105 (1968) pp. 365-366. http://gdmltest.u-ga.fr/item/GDZPPN002402599/