1. F. Gürsey andL. A. Radicati:Phys. Rev. Lett.,13, 173 (1964).
2. RecentlyV. Barger andM. H. Rubin have studied the same problem under the assumption ofs-wave dominance in one of the crossed channels which seems quite arbitrary. Their results are in violent contradiction with experiments.
3. H. Joos:Bemerkungen zur Phase-Shift Analysis auf Grund der Darstellung der Theorie der inhomogenen Lorentzgruppe (Oberwolfach, 1959);A. J. Macfarlane:Rev. Mod. Phys.,34, 41 (1962).
4. This point has been raised in conversation withF. Gürsey andL. Michel.
5. M. Gell-Mann:Phys. Rev. Lett.,14, 77 (1965).