1. C. Ambrozie and F.-H. Vasilescu, Banach space complexes, Kluwer Acacemic Publishers, Dordrecht, 1995.
2. J. Eschmeier and M. Putinar, Spectral decompositions and analytic sheaves, LMS Monograph Series 10, Clarendon Press, Oxford, 1996.
3. Springer Lecture Notes 345;JW Helton,1973
4. L. Hörmander, The analysis of linear partial differential operators III, Springer, Berlin, 1994.
5. R. Levy, Algebraic and topological K-functors of commuting n-tuples of operators, J. Operator Theory, 21 (1989), 219–254.