1. W. P. Trower, J. R. Ficenec, R. I. Hulsizer, J. Lathrop, J. N. Snyder andW. P. Swanson:Phys. Rev.,170, 1207 (1968);J. R. Ficenec, R. I. Hulsizer, W. P. Swanson andW. P. Trower:Phys. Rev.,169, 1034 (1968).
2. See for exampleJ. Meyer: Proceedings of theHeidelberg International Conference on Elementary Particles (1967), p. 117.
3. R. W. Birge, R. P. Ely, G. E. Kalmus, A. Kernan, J. Louie, J. S. Sahouria andW. M. Smart:Proceedings of the Second Topical Conference on Resonant Particles, Athens, Ohio, 1965 (Athens, O., 1965), p. 296.
4. R. Armenteros, M. Ferro-Luzzi, D. W. G. Leith, R. Levi-Setti, A. Minten, R. D. Tripp, H. Filthuth, V. Hepp, E. Kluge, H. Schneider, R. Barloutaud, P. Granet, J. Meyer andJ. P. Porte:Phys. Lett. 19, 338 (1965).
5. G. R. Charlton:The reactions к-р → Σ±π-+(π0) (near 1755 MeV, Ph. D. Thesis, University of Maryland, College Park, 1966 (unpublished).