1. L. D. Landau, Zh. Éksp. Teor. Fiz. 30, 1058 (1956) [Sov. Phys. JETP 3, 920 (1956)].
2. V. M. Galitskii and A. B. Migdal, Zh. Éksp. Teor. Fiz. 34, 139 (1958) [Sov. Phys. JETP 7, 96 (1958)].
3. A. B. Migdal, Nuclear Theory; the Quasiparticle Method (Nauka, Moscow, 1967; Benjamin, New York, 1968); Theory of Finite Fermi Systems and Applications to Atomic Nuclei (Nauka, Moscow, 1983, 2nd ed.; Wiley, New York, 1967).
4. E. M. Lifshitz and L. P. Pitaevskii, Course of Theoretical Physics, Vol. 5: Statistical Physics (Nauka, Moscow, 1978; Pergamon, Oxford, 1980), Part 2.
5. A. B. Migdal, Zh. Éksp. Teor. Fiz. 61, 2209 (1971) [Sov. Phys. JETP 34, 1184 (1972)].