1. Abrikosov, A.A., Gorkov, L.P., Dzyaloshinski, I.E.: Methods of quantum field theory in statistical physics. 1st Edn. Englewood Cliffs, NY: Prentice-Hall 1963
2. Migdal, A.B.: Theory of finite Fermi systems. 1st Edn. New York: Wiley-Interscience 1967
3. Thouless, D.J.: The quantum mechanics of many-body systems. 2nd Edn. New York, London: Academic Press 1972
4. Fetter, A.L., Walecka, J.D.: Quantum theory of many-particle systems. 1st Edn. New York: McGraw-Hill 1971
5. Fukuda, N., Iwamoto, F., Sawada, K.: Phys. Rev.135, A932 (1964)