1. D. I. Olive:Towards an axiomatisation of S-matrix theory (Cambridge, 1963), (preprint).
2. P. V. Landshoff :The S-Matrix Without Field Theory (Cambridge, 1964).
3. H. P. Stapp:The decomposition of the S-matrix and the connection between spin,and statistics, UCRL-10289 (1962).
4. J. C. Polktnghorne:Nuovo Cimento,23, 360 (1962);25, 901 (1962).
5. H. P. Stapp:Phys. Rer.,125, 2139 (1962).