V. G. Veselago, 1968, Sov. Phys. Usp., 10, 509, 10.1070/PU1968v010n04ABEH003699
D. F. Sievenpiper, 1996, Phys. Rev. Lett., 76, 2480, 10.1103/PhysRevLett.76.2480
J. B. Pendry, 1996, Phys. Rev. Lett., 76, 4773, 10.1103/PhysRevLett.76.4773
J. B. Pendry, 1998, J. Phys. Condens. Matter, 10, 4785, 10.1088/0953-8984/10/22/007
J. B. Pendry, 1999, IEEE Trans. Microwave Theory Tech., 47, 2075, 10.1109/22.798002
D. R. Smith, 2000, Phys. Rev. Lett., 84, 4184, 10.1103/PhysRevLett.84.4184
R. H. Ritchie, 1957, Phys. Rev., 106, 874, 10.1103/PhysRev.106.874
T. W. Ebbesen, 1998, Nature (London), 391, 667, 10.1038/35570
J. A. Porto, 1999, Phys. Rev. Lett., 83, 2845, 10.1103/PhysRevLett.83.2845