1. Agler, J., "Subjordan operators",Jour. of Func. Anal., (to appear).
2. Agler, J., "Subjordan operators: Bishop's theorem, spectral inclusion, and spectral sets",Jour. of Op. Th., (to appear).
3. Arveson, W.B., "Subalgebras of C*-algebras",Acta Math. 123 (1969).
4. Ball, J.A., "Rota's Theorem for general functional Hilbert spaces",P.A.M.S. 64 (1977), 55–61.
5. de Branges, L. and Rovnyak, J., "Appendix on square summable power series, Canonical models in quantum scattering theory,Perturbation Theory and its Applications in Quantum Mechanics, 347–392, Wiley, New York, 1966.