1. Methods of Mathematical Physics, Vol. 1;Courant,1953
2. The Mathematical Theory of Huygens’ Principle;Baker,1939
3. Space-Time Approach to Non-Relativistic Quantum Mechanics
4. Path Summation: Achievements and Goals (Trieste, 1987);Gutzwiller,1988
5. The Feynman Lectures on Physics, Vol.3;Feynman,1989