1. Walker J, Halliday D, Resnick R. Fundamentals of Physics. 11th (Extended) ed. Hoboken, NJ: John Wiley & Sons; 2018, Chapters 18 and 20 (especially Sections 20-2 and 20-3)
2. Callen HB. Thermodynamics. New York, NY: John Wiley & Sons; 1960, Chapter 4
3. Callen HB. Thermodynamics and an Introduction to Thermostatistics. 2nd ed. New York, NY: John Wiley & Sons; 1985, Chapter 4
4. Baierlein R. Thermal Physics. Cambridge, UK: Cambridge University Press; 1999, Chapters 2 and 3
5. Reif F. Fundamentals of Statistical and Thermal Physics. New York, NY: McGraw-Hill; 1965 (reissued: Long Grove, Illinois: Waveland Press; 2009), Sections 5.11 and 5.12, and Problems 5.22 through 5.26