1. J.D. Jackson, Classical Electrodynamics (Wiley, New York, 1975).
2. W.A. Harrison, Electronic Structure and the Properties of Solids: The Physics of the Chemical Bond; (Dover, New York, 1989).
3. N.W. Ashcroft, N.D. Mermin, Solid State Physics (Saunders College, Philadelphia, 1976).
4. D.J. Griffiths, Introduction to Quantum Mechanics (Prentice Hall, New Jersey, 1995).
5. C. Kittel, Introduction to Solid State Physics (Wiley, New York, 1976).