Liu, Ruopeng; Cui, Tie Jun; Huang, Da; Zhao, Bo; Smith, David R. (2007). "Description and explanation of electromagnetic behaviors in artificial metamaterials based on effective medium theory". Physical Review E (İngilizce). 76 (2). s. 026606. doi:10.1103/PhysRevE.76.026606.
Soukoulis, C. M.; Kafesaki, M.; Economou, E. N. (2006). "Negative‐Index Materials: New Frontiers in Optics". Advanced Materials (İngilizce). 18 (15). ss. 1941-1952. doi:10.1002/adma.200600106.