@article{1102912468,
author = {Johnson, Charles R.},
title = {The Hadamard product of $A$ and $A^{\ast}$.},
journal = {Pacific J. Math.},
volume = {55},
number = {2},
year = {1974},
pages = { 477-481},
language = {en},
url = {http://dml.mathdoc.fr/item/1102912468}
}
Johnson, Charles R. The Hadamard product of $A$ and $A^{\ast}$.. Pacific J. Math., Tome 55 (1974) no. 2, pp. 477-481. http://gdmltest.u-ga.fr/item/1102912468/