@conference{7151,
  author = {Michael Lombardi and Judah Levine and Jose Lopez and Francisco Jimenez and John Bernard and Marina Gertsvolf and Harold Sanchez and Oscar Fallas and Liz Hernandez and Ricardo de and Mario Fittipaldi and Raul Solis and Franklin Espejo},
  title = {International Comparisons of Network Time Protocol Servers},
  year = {2014},
  month = {2014-12-04},
  publisher = {Proceedings of the Precise Time and Time Interval Systems and Applications (PTTI) Meeting, Boston, MA},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917539},
  language = {en},
}