1. S. S. Schweber, An Introduction to Relativistic Quantum Field Theory (Harper & Row, New York, 1962).
2. I. Bialynicki-Birula and Z. Bialynicka-Birula, Quantum Electrodynamics (Pergamon, Oxford, 1975).
3. W. Greiner, B. Müller, and J. Rafelski, Quantum Electrodynamics of Strong Fields (Springer, Berlin, 1985).
4. R. H. Landau, Quantum Mechanics II (Wiley, New York, 1990).
5. P. W. Miloni, The Quantum Vacuum (Academic, San Diego, CA, 1993).