@article{194221,
  author = {Paul Williams},
  title = {Modulation phase-shift measurement of PMD using only four launched polarisation states: a new algorithm},
  year = {1999},
  number = {35},
  month = {1999-09-02},
  publisher = {Electronics Letters},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=28538},
  language = {en},
}