@conference{68876,
  author = {Paul Williams},
  title = {Long distance frequency transfer through an optical carrier},
  year = {2009},
  number = {7431},
  month = {2009-08-02},
  publisher = {Proceedings of SPIE Optics and Photonics 2009, San Diego, CA},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=903121},
  language = {en},
}