1. C. A. Desoer and M. Vidyasagar,Feedback Systems, Input-Output Properties, Academic, New York, 1975.
2. A. Feintuch and R. Saeks,Extended spaces and the resolution topology, Int. J. Control33 (1981), 347–354.
3. A. Feintuch and R. Saeks,System Theory-A Hilbert Space Approach, Academic, New York, 1982.
4. J. Horvath,Topological Vector Spaces, Addison Wesley, Reading, MA, 1966.
5. D. Larson,Nest algebras and similarity transformations (preprint).