@misc{64081,
  author = {Michael Lombardi},
  title = {NIST Time and Frequency Services},
  year = {2002},
  month = {2002-01-01},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105432},
  language = {en},
}