1. Wilks J. (1967) The Properties of Liquid and Solid Helium. Clarendon Press, Oxford, p. 3.
2. P. Love, Physical Chemistry Abstracts, 224th ACS National Meeting (2002), p. 309.
3. Alexandrov A.S., Ranninger J. (1992) . Solid State Commun. 81:403
4. R. Baierlein, Thermal Physics (Cambridge, Cambridge, 2001), pp. 33–37.
5. Stowe K. (1984) Introduction to Statistical Mechanics and Thermodynamics. Wiley, New York, pp. 435–437.