@misc{indiciaec6cc6cc02c31,
  title = {Complex coordinates in transformation optics},
  author = {Popa, Bogdan-Ioan and Cummer, Steven A.},
  year = {2011},
  doi = {10.1103/physreva.84.063837},
  url = {https://www.osti.gov/biblio/22095725},
  note = {Source identifier: 22095725}
}