1. E. C. G. Sudarshan:Fields and Quanta 2, 175 (1971);C. A. Nelson andE. C. G. Sudarshan:Phys. Rev. D,6, 3658, 3678 (1972);A. M. Gleeson, R. J. Moore, H. Rechenberg andE. C. G. Sudarshan:Phys. Rev. D,4, 2242 (1971).
2. A detailed discussion of this point is given inH. P. Stapp:Macrocausality and its role in physical theories, Lawrence Berkeley Laboratory Report LBL-2031, May 1973. Also in conference onCausality and Physical Theories held at Wayne State University, Detroit, Mich., in May 1973. To be published inAmerican Institute of Physics Conference Proceedings.
3. H. Rechenberg andE. C. G. Sudarshan:Nuovo Cimento,14 A, 299 (1973).
4. D. Iagolnitzer andH. P. Stapp:Comm. Math. Phys.,14, 15 (1969).
5. T. D. Lee: inQuanta—Essays in Theoretical Physics Dedicated to Gregor Wentzel, edited byP. G. O. Freund, C. J. Goebel andY. Nambu (Chicago, Ill., 1970), p. 290.