1. Veselago V.G. (1967), About properties of substances with simultaneously negative values of dielectric and magnetic permeabilities, Soviet Phys. Solid State
8, 2853
2. Veselago V.G. (1968) The electrodynamics of substances with simultaneously negative values of ε and μ, Soviet Physics USPEKHI, 10, 509–514
3. Veselago V.G. (1967) The electromagnetic properties of a mixture of electric and magnetic charges, Soviet Physics JETP, 25, 680
4. Veselago V.G. (1972) Electrodynamics of Substances with Simultaneously Negative Electrical and Magnetic Permeabilities, in E. Burstein and Francesco de Martini (eds.), POLARITONS, Proceedings of first Taormina research conference on the structure of matter, 2–6 October 1972, Taormina, Italy, Pergamon Press.
5. Smith D. R., Padilla W., Vier D. C, Nemat-Nasser S. C, Schultz S. (2000). A Composite medium with simultaneously negative permeability and permittivity, Phys. Rev. Lett., 84, 4184