1. C. Kittel, Introduction to Solid-State Physics (Wiley, New York, 1968)
2. W. Shockley, Electrons and Holes in Semiconductors (D. Van Nostrand Company, 1950)
3. R.B. Adler, A.C. Smith, R.L. Longini, Semiconductor electronics education committee, in Introduction to Semiconductor Physics, vol. 1, (Wiley, 1964)
4. W. Finkelburg, Einfuehrung in die Atomphysik (Springer, 1958)
5. J.L. Moll, Physics of Semiconductors (McGraw-Hill, 1964)