*. 1+, Tables of Integral Transforms, Higher Transcendental Functions, vol.12, p.7523, 1953.

E. Michael, D. V. Peskin, and . Schroeder, An Introduction to Quantum Field Theory, 1995.

W. Peter and . Milonni, The Quantum Vacuum, 1994.

J. J. Sakurai, Advanced Quantum Mechanics, 1967.

R. Glauber and W. , Rarita and P. Schwed Vacuum polarization Effects on Energy Levels in ? Mesonic Atoms Phys, Rev, vol.120, p.609, 1960.