1. G. F. Carrier, M. Krook andC. E. Pearson:Functions of a Complex Variable (New York, N.Y., 1966).
2. J. M. Jauch:Foundations of Quantum Mechanics (Reading, Mass., 1968);C. Piron:Foundations of Quantum Physics (Reading, Mass., 1976).
3. G. Luders:Ann. Phys. (Leipzig),8, 322 (1951).
4. K. McFarlane andK. K. Wan:J. Phys. A.,14, L1 (1981).
5. O. Bratteli andD. W. Robinson:Operator Algebras and Quantum Statistical Mechanics, Vol.1 (New York, N. Y., 1979), p. 187.