@article{754821,
  author = {Thomas Heavner and Steven Jefferts and Elizabeth Donley and Jon Shirley and Tom Parker},
  title = {NIST F1: Recent improvements and a resulting accuracy of &#948;f/f=0.53x10<sup>-15</sup>},
  year = {2005},
  number = {42},
  month = {2005-09-13 00:09:00},
  publisher = {Metrologia},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50098},
  language = {en},
}