@article{GDZPPN002307499, title = {On the Metric Geometry of Ideals of Operators on Hubert Space.}, journal = {Mathematische Annalen}, volume = {201}, year = {1973}, pages = {157-164}, zbl = {0234.47045}, url = {http://dml.mathdoc.fr/item/GDZPPN002307499} }
Holub, J.R. On the Metric Geometry of Ideals of Operators on Hubert Space.. Mathematische Annalen, Tome 201 (1973) pp. 157-164. http://gdmltest.u-ga.fr/item/GDZPPN002307499/