Operators of class C₀ with spectra in multiply connected regions /
Zucchi, Adele,1966-
Providence, R.I. : American Mathematical Society,
1997.
"May 1997, volume 127, number 607 (third of 4 numbers)."
Includes bibliographical references (p. 51-52)
Nonselfadjoint operators.
Functional analysis.
Hardy classes.