V. Veselago, THE ELECTRODYNAMICS OF SUBSTANCES WITH SIMULTANEOUSLY NEGATIVE VALUES OF $\epsilon$ AND ??, Soviet Physics Uspekhi, vol.10, issue.4, pp.509-514, 1968.
DOI : 10.1070/PU1968v010n04ABEH003699

R. A. Shelby, D. R. Smith, and S. Schultz, Experimental Verification of a Negative Index of Refraction, Science, vol.292, issue.5514, pp.77-79, 2001.
DOI : 10.1126/science.1058847

O. F. Siddiqui, M. Mojahedi, and G. V. Eleftheriades, Periodically Loaded Transmission Line With Effective Negative Refractive Index and Negative Group Velocity, IEEE Trans. Antennas Propagat, vol.51, issue.10, 2003.
DOI : 10.1109/aps.2003.1217561

A. Lai, C. Caloz, and T. Itoh, Composite right/left-handed transmission line metamaterials, IEEE Microwave Magazine, vol.5, issue.3, pp.34-50, 2004.
DOI : 10.1109/MMW.2004.1337766

M. A. Antoniades and G. V. Eleftheriades, Compact linear lead/lag metamaterial phase shifters for broadband applications, IEEE Antennas and Wireless Propagation Letters, vol.2, issue.1, 2003.
DOI : 10.1109/LAWP.2003.815280

M. L. Roy, E. Lheurette, and A. Pérennec, Pulse Compression with Superluminal Group Velocity in 1-D Photonic Bandgap Coplanar Waveguide, Proc. 34 th European Microwave Conf, pp.463-466, 2004.
URL : https://hal.archives-ouvertes.fr/hal-00809272

L. J. Wang, A. Kuzmich, and A. Dogariu, correction: Gain-assisted superluminal light propagation, Nature, vol.63, issue.6840, pp.277-279, 2000.
DOI : 10.1038/35082117

D. Solli and R. Y. Chiao, Superluminal effects and negative group delays in electronics, and their applications, Physical Review E, vol.66, issue.5, 2002.
DOI : 10.1103/PhysRevE.66.056601

M. Kitano, T. Nakanishi, and K. Sugiyama, Negative group delay and superluminal propagation: an electronic circuit approach, IEEE Journal of Selected Topics in Quantum Electronics, vol.9, issue.1, p.43, 2003.
DOI : 10.1109/JSTQE.2002.807979

URL : http://arxiv.org/abs/quant-ph/0302166