@conference{192176,
  author = {Rex Craig},
  title = {Visualizing the Limitations of Four-State Measurement of PDL and Results of a Six-State Alternative},
  year = {2002},
  month = {2002-09-01},
  publisher = {Tech. Dig., Symp. on Optical Fiber Meas., Boulder, CO},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30108},
  language = {en},
}