1. E. M. Lifshitz and L.P. Pitaevskii, Statistical Physics, Part 2. Pergamon, Oxford (1988).
2. A. A. Abrikosov, L. P. Gor’kov, and I.Ye. Dzyaloshinskii, Quantum Field Theoretical Methods in Statistical Physics, Pergamon Press, Oxford (1965).
3. R.K.Pathria, Statistical Mechanics, Elsevier, Oxford (1996).
4. L.P. Pitaevskii ̆ and S. Stringari, Bose–Einstein Condensation, Clarendon, Oxford (2003).
5. R. M. Ziff, G. E.Uhlenbeck, and M.Kac, Phys. Rep., 32, 169 (1977).