@article{GDZPPN002427591,
title = {An Analogue of a Hardy-Littlewood-Fej\'er Inequality for Upper Triangular Trace Class Operators.},
journal = {Mathematische Zeitschrift},
volume = {183},
year = {1983},
pages = {473-484},
zbl = {0495.47027},
url = {http://dml.mathdoc.fr/item/GDZPPN002427591}
}
Shields, Allen L. An Analogue of a Hardy-Littlewood-Fejér Inequality for Upper Triangular Trace Class Operators.. Mathematische Zeitschrift, Tome 183 (1983) pp. 473-484. http://gdmltest.u-ga.fr/item/GDZPPN002427591/