@misc{indiciaebee0690576d3,
  title = {Physics. Negative refractive index at optical wavelengths.},
  author = {Costas M Soukoulis and Stefan Linden and Martin Wegener},
  year = {2007},
  doi = {10.1126/science.1136481},
  url = {https://pubmed.ncbi.nlm.nih.gov/17204630/},
  note = {Source identifier: 17204630}
}