1. M. Gell-Mann:The Eightfold Way: A Theory of Strong Interaction Symmetry, California Institute of Technology, Report CTSL-20, March 1961 (unpublished);Phys. Rev.,125, 1067 (1962).
2. Y. Ne’eman:Nucl. Phys.,26, 222 (1961).
3. J. J. de Swart:Rev. Mod. Phys.,35, October (1963). In the following we will refer to this as A.
4. H. Goldberg: (to be published).
5. D. E. Neville: (to be published).