1. E. Fermi,Thermodynamics(Dover, New York, 1956).
2. R. Clausius,On the Mechanical Theory of Heat, translated by W. R. Browne (Cambridge University, London, 1879).
3. W. Thomson, Trans. R. Soc. Edinburgh, March (1851).
4. S. Carnot,Reflections on the Motive Power of Fire, translated by R. H. Thurston (Dover, New York, 1960).