@article{1008719034,
author = {Duggal, B. P.},
title = {The operator inequality $P\sp {2k}\leq A\sp *P\sp {2k}A$},
journal = {Michigan Math. J.},
volume = {49},
number = {1},
year = {2001},
pages = { 39-45},
language = {en},
url = {http://dml.mathdoc.fr/item/1008719034}
}
Duggal, B. P. The operator inequality $P\sp {2k}\leq A\sp *P\sp {2k}A$. Michigan Math. J., Tome 49 (2001) no. 1, pp. 39-45. http://gdmltest.u-ga.fr/item/1008719034/