@article{GDZPPN002060434,
title = {The Spectra of Hyponormal Integral Operators},
journal = {Commentarii mathematici Helvetici},
volume = {46},
year = {1971},
pages = {451-456},
zbl = {0228.47035},
url = {http://dml.mathdoc.fr/item/GDZPPN002060434}
}
Putnam, C.R.; Clancey, K.F. The Spectra of Hyponormal Integral Operators. Commentarii mathematici Helvetici, Tome 46 (1971) pp. 451-456. http://gdmltest.u-ga.fr/item/GDZPPN002060434/