1. L.D. Landau, L.P. Pitaevskii, E.M. Lifshitz, Electrodynamics of Continuous Media, second ed., vol. 8 (Course of Theoretical Physics), Butterworth-Heinemann, January 1984 (Sec. 80).
2. See for example: L. Tsang, J.A. Kong, K.-H. Ding, Scattering of Electromagnetic Waves Theories and Applications, Wiley, New York, 2000.
3. Nonlocal nature of the electrodynamic response of colloidal systems
4. See for example: J. Pendry, D. Smith, Physics Today (2003) December; Focus on Negative Refraction, New J. Phys. 7 (2005).
5. Is there an experimental verification of a negative index of refraction yet?