1. V. P. Maslov, ArXiv:0903.4783v2, 2009.
2. V. P. Maslov, Russ. J. Math. Phys. 19(1), 63–100 (2012).
3. V. P. Maslov, A. V. Maslov, and T. V. Maslova, Russ. J. Math. Phys. 18(3), 329–337 (2011).
4. L. D. Landau and E. M. Lifshits, Statistical Physics (Fizmatlit, Moscow, 2001), Vol. 5 [in Russian].
5. I. A. Molotkov, Dokl. Math. 81, 481–484 (2010).