1. R. Armenteros, D. N. Edwards, T. Jacobsen, A. Shapira, J. Vandermeulen, Ch. d'Andlau, A. Astier, P. Baillon, H. Briand, J. Cohen-Ganouna, C. Defoix, J. Siaud, C. Ghesquière and P. Rivet:Proceedings of the Sienna International Conference on Elementary Particles, vol.1 (1963), p. 287.
2. R. Armenteros, D. N. Edwards, T. Jacobsen, A. Shapira, L. Montanet, J. Vandermeulen, Ch. d'andlau, A. Astier, P. Baillon, H. Briand, J. Cohen-Ganouna, C. Defoix, J. Siaud, C. Ghesquière and P. Rivet:Proceedings of the Dubna International Conference on High Energy Physics, vol.1 (1964), p. 467.
3. R. I. Hess, S. V. Chung, O. I. Dahl, L. M. Hardy, J. Kirz andD. H. Miller:Proceedings of the Dubna International Conference on High Energy Physics, vol.1 (1964), p. 422.
4. B. R. French, L. B. Kinson, V. Simak, J. Badier, M. Bazin, A. Rougé andP. Grieve:Proceedings of the Dubna International Conference on High Energy Physics, vol.1 (1964), p. 581.
5. I. Duboc, A. Minten andS. Wojcicki: CERN report 65-2.