1. A. F. Ioffe , Physics of Semiconductors, Academic Press, New York, 1960 (translated from Russian, Fizika Poluprovodnikov, Russian Academy of Sciences, Moscow, 1957)
2. We have not been able to find the original reference to N. L. Pisarenko
3. G. A. Slack , New Materials and Performance Limits for Thermoelectric Cooling, in CRC Handbook of Thermoelectrics, ed. D. M. Rowe, CRC Press LLC, Boca Raton, FL, 1995, p. 407
4. N. W. Ashcroft and D. N.Mermin, Solid-State Physics, Holt, Rhinehart and Winston, New York, 1976