@article{NUMA_1962__4_131543,
     author = {CH. DAVIS},
     title = {The {Norm} of the {Schur} {Product} {Operation.}},
     journal = {Numerische Mathematik},
     pages = {343--344},
     publisher = {mathdoc},
     volume = {4},
     year = {1962},
     zbl = {0111.01504},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1962__4_131543/}
}