1. Space-Time Approach to Non-Relativistic Quantum Mechanics
2. and , Path Integrals and Quantum Mechanics, McGraw-Hill, New York (1968).
3. Quantum Field Theory II, Hefner, New York (1968);
4. Erice Lectures 1974, in Laws of Hadronic Matter, ed, by A. Zichichi, p. 172.
5. See for example: , , Methods of Quantum Field Theory in Statistical Physics, Dover, New York (1975);