1. For a general introduction to conservation laws, quantum numbers and general theories we suggest, among the many books:R. Hagedorn:Relativistic Kinematics (New York, Amsterdam, 1963) (for kinematics, Dalitz plot, etc.);M. Gell-Mann andY. Ne’eman:The Eightfold Way (New York, 1964);P. A. Carruthers:Introduction to Unitary Symmetry (New York, 1966);K. Nishijima:Fundamental Particles (New York, Amsterdam, 1963);S. Gasiorowicz:Elementary Particle Physics (New York, London, Sydney, 1967);G. Puppi:Ann. Rev. Nucl. Sci.,13, 287 (1963).
2. A. Pevsner, R. Kraemer, M. Nussbaum, C. Richardson, P. Schlein, R. Strand, T. Toohig, M. Block, A. Engler, R. Gessaroli andC. Meltzer:Phys. Rev. Lett.,7, 421 (1961).
3. Y. Nambu:Phys. Rev.,106, 1366 (1957);G. F. Chew:Phys. Rev. Lett.,4, 142 (1960);J. Sakurai:Ann. of Phys.,11, 1 (1960);S. Bergia, A. Stanghellini, S. Fubini andC. Villi:Phys. Rev. Lett.,6, 367 (1961).
4. M. Gell-Mann:Phys. Rev.,125, 1067 (1962);A. Pevsner, R. Kraemer, M. Nussbaum, P. Schlein, T. Toohig, M. Block, A. Kovacs andC. Meltzer:Proceedings of the 1961 Conference on Elementary Particles, Aix-en-Provence.
5. M. Block:Phys. Rev.,101, 796 (1956);P. P. Srivastava andG. Sudarshan:Phys. Rev.,110, 765 (1958).