@misc{indiciae9f00b33a27cf,
  title = {Gradient index metamaterials.},
  author = {D R Smith and J J Mock and A F Starr and D Schurig},
  year = {2005},
  doi = {10.1103/physreve.71.036609},
  url = {https://pubmed.ncbi.nlm.nih.gov/15903607/},
  note = {Source identifier: 15903607}
}