1. M. R. A. Shegelski, Solid State Commun. 58: 351 (1986).
2. M. R.A. Shegelski, Am. J. of Phys. 72: 676 (2004).
3. But later in his papers these quantities may be calculated either in the canonical or in the grand canonical ensemble.
4. C. Kittel, Introduction to Solid State Physics, John Wiley and Sons, New York (1971).
5. N. W. Ashcroft and N. D. Mermin, Solid State Physics, Saunders College, Philadelphia (1976).