@article{179206,
  author = {Leo Hollberg and Scott Diddams and A Bartels and Tara Fortier and Kyoungsik Kim},
  title = {The Measurement of Optical Frequencies},
  year = {2005},
  number = {42},
  month = {2005-06-07},
  publisher = {Metrologia},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50103},
  language = {en},
}