@article{1255988721,
author = {Maher, P. J.},
title = {Partially isometric approximation of positive operators},
journal = {Illinois J. Math.},
volume = {33},
number = {4},
year = {1989},
pages = { 227-243},
language = {en},
url = {http://dml.mathdoc.fr/item/1255988721}
}
Maher, P. J. Partially isometric approximation of positive operators. Illinois J. Math., Tome 33 (1989) no. 4, pp. 227-243. http://gdmltest.u-ga.fr/item/1255988721/