1Pendry J. B., Holden A. J., Stewart W. J., et al. Extremely Low Frequency Plasmons in MetallicMesostructures [J]. Phys Rev Let t, 1996,76 : 477324776.
2Pendry J. B., Holden A. J., Robbins D. J., et al. Magnetism from Conductors and Enhanced Nonlinear Phenomena [J]. IEEE Trans Microwave Theory and Tech, 1999,47 : 207522084.
3Hongsheng Chen, Lixin Ran, Jiangtao Huangfu, Xianmin Zhang, Kangsheng Chen. Left-handed Materials Composed of only S-shaped Resonators [J]. Physical Review E. 2004, 70,057605-[4.