1. Einstein, A., Podolsky, B., and Rosen, N. (1935).Physical Review,47, 777.
2. Feynman, R. P., and Hibbs, A. R. (1965).Quantum Mechanics and Path Integrals, McGraw-Hill, New York, Chap. 6.
3. Gradshtein, I. S., and Ryzik, I. M. (1971).Tables of Integrals, Sums, Series and Products, Nauka, Moscow.
4. Todorov, N. S. (1980).International Journal of Theoretical Physics,19, 605.
5. Todorov, N. S. (1980).International Journal of Theoretical Physics,19, 725.