Roy Mathias. The Hadamard Operator Norm of a Circulant and Applications. SIAM J. Matrix Analysis Applications, 14(4):1152-1167, October 1993. [doi]
@article{Mathias93b,
title = {The Hadamard Operator Norm of a Circulant and Applications},
author = {Roy Mathias},
year = {1993},
month = {October},
doi = {10.1137/0614080},
url = {https://doi.org/10.1137/0614080},
researchr = {https://researchr.org/publication/Mathias93b},
cites = {0},
citedby = {0},
journal = {SIAM J. Matrix Analysis Applications},
volume = {14},
number = {4},
pages = {1152-1167},
}