@misc{indiciaeb73a2c4e085a,
  title = {Optics: Positively negative.},
  author = {John Pendry},
  year = {2003},
  doi = {10.1038/423022a},
  url = {https://pubmed.ncbi.nlm.nih.gov/12721606/},
  note = {Source identifier: 12721606}
}