@article{GDZPPN002402858,
title = {Hyponormal Operators and Low Density Spectra.},
journal = {Mathematische Zeitschrift},
volume = {105},
year = {1968},
pages = {167-169},
zbl = {0157.45503},
url = {http://dml.mathdoc.fr/item/GDZPPN002402858}
}
Putnam, C.R. Hyponormal Operators and Low Density Spectra.. Mathematische Zeitschrift, Tome 105 (1968) pp. 167-169. http://gdmltest.u-ga.fr/item/GDZPPN002402858/