@article{147976,
  author = {Christopher Oates},
  title = {Keeping time in three dimensions},
  year = {2008},
  number = {4},
  month = {2008-12-01},
  publisher = {Nature Physics},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=900870},
  language = {en},
}