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2. M. Gell-Mann:The Eightfold Way: A Theory of Strong Interaction Symmetry (CTSL-20, unpublished);Y. Neeman:Nucl. Phys., 26, 222 (1961).
3. R. Barloctaud, J. Heughebaert, A. Leveque, J. Meter andR. Omnès:Evidence for a T = Pion-Pion Resonance at 575 MeV (Saclay 61-13, to be published).
4. A. Pevsner: Private communication of preliminary results.
5. A. Baz:Żurn. Ėksp. Tear. Fiz.,40, 1511 (1961). [Translation:Soviet Phys. JETP,13, 1058 (1961)].