1. Wald, R.M.: Black holes and thermodynamics. arXiv:gr-qc/970202201 (11-2-1997). In: Proceedings on the Symposium on Black Holes and Relativistic Stars, Chicago (1996)
2. Aizenman, M., Lieb, E.H.: J. Stat. Phys. 24, 279 (1981)
3. Lieb, E.H.: Phys. Rev. Lett. 18, 692 (1967)
4. Wald, R.M.: Phys. Rev. D 56, 6467 (1997)
5. Fermi, E.: Notes on Thermodynamics and Statistics. University of Chicago Press, Chicago (1966)