1. H. J. Lipkin andM. Peshkin: to be published.
2. M. Peshkin:Phys. Rev.,121, 636 (1961).
3. C. H. Llewellyn Smith andA. Pais: to be published.
4. These results can be found inC. H. Llewellyn Smith:Phys. Reports, to be published.
5. R. J. Oakes:Phys. Rev.,131, 2239 (1961).