1. and , Linear Operators in Spaces with an Indefinite Metric (John Wiley & Sons, Chichester, 1989).
2. , and , Calkin Algebras and Algebras of Operators on Banach Spaces (Marcel Dekker, New York, 1974).
3. A Course in Operator Theory (American Mathematical Society, Providence, R. I., 2000).
4. Iteration and the solution of functional equations for functions analytic in the unit disk