1. W. G. Oldham and S. E. Schwarz, An Introduction to Electronics, Holt, Rinehart, and Winston, New York (1972), Chapter 5.
2. J. Millman and C. C. Halkias, Integrated Electronics, McGraw-Hill, New York (1972), Chapter 4.
3. See, for example, C. Kittel, Introduction to Solid State Physics, Third Edition, John Wiley, New York (1966), page 323.
4. See References 38-40 of Chapter 2.
5. See References 26 and 27 of Chapter 2.