1. Y. Nambu:Phys. Rev. D,7, 2405 (1973).
2. See alsoA. J. Kálnay inCollogue Internationale de Geometrie Symplectique et Physique Mathematique (Colloques Internationaux C.N.R.S., Aix-en-Provence, France, 1974), and references cited therein.
3. See, for instance, Ch.-J. de La Vallée Poussin:Cours d’Analyse Infinitesimale (Paris, 1949).
4. See for instance,B. C. G. Sudarshan andN. Mukunda:Classical Dynamics: A Modern Perspective (New York, N. Y., 1974).
5. I. Cohen andA. J. Kálnay:Intern. J. Theor. Phys.,12, 61 (1975).