1. V. Veselago, Sov. Phys. Usp. 10, 509 (1968)
2. H. Lamb, Negative phase velocity and its consequence in hydrodynamics: “On group velocity”. Proc. Lond. Math. Soc. 1, 473–479 (1904)
3. A. Schuster, Negative Phase Velocity and Its Consequence in Optics: An Introduction to the Theory of Optics (Edward Arnold, 1904)
4. L. Mandelshtam, Optical properties of the left-handed media: the 4th lecture of L. I. Mandel’shtam given at Moscow State University (05/05/1944). Nauka 5, 461 (1994)
5. N.A. Khizhnyak, Anomalously large effective dielectric and magnetic constants for the resonant regimes of elementary scatterers: artificial anisotropic dielectrics formed from two-dimensional lattices of infinite bars and rods. Sov. Phys. Technol. Phys. 29, 604–614 (1959)