1. S. V. Vonsovskii, Magnetism (Nauka, Moscow, 1971; Wiley, New York, 1971).
2. T. Dietl, Nat. Mater. 9, 965 (2010).
3. L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 8: Electrodynamics of Continuous Media (Nauka, Moscow, 1982; Pergamon, New York, 1984).
4. V. B. Berestetskii, E. M. Lifshitz, and L. P. Pitaevskii, Course of Theoretical Physics, Vol. 4: Quantum Electrodynamics (Fizmatlit, Moscow, 2002; Pergamon, Oxford, 1982).
5. A. Kadigrobov, Z. Ivanov, T. Claeson, R. I. Shekhter, and M. Jonson, Europhys. Lett. 67, 948 (2004).