1. Hatsopoulos, G. N., and Keenan, J. H., Principles of General Thermodynamics, 163 (Wiley, New York, 1965).
2. Wilkie, D. R., Nature, 245, 457–458 (1973).
3. Keenan, J., Thermodynamics (Wiley, New York, 1941).
4. Sussman, M., Elementary General Thermodynamics, 244–245 (Addison-Wesley, Reading, Massachusetts, 1972).
5. Zemansky, M., Heat and Thermodynamics, fourth ed., 168 (McGraw-Hill, New York, 1957).