TY  - RPRT
TI  - Physics. Negative refractive index at optical wavelengths.
AU  - Costas M Soukoulis
AU  - Stefan Linden
AU  - Martin Wegener
PY  - 2007
DO  - 10.1126/science.1136481
UR  - https://pubmed.ncbi.nlm.nih.gov/17204630/
ID  - 17204630
ER  -