@article{64351,
  author = {Chin-Wen Chou and David Hume and J.C. Koelemeij and David Wineland and Till Rosenband},
  title = {Frequency Comparison of Two High-Accuracy Al+ Optical Clocks},
  year = {2010},
  number = {104},
  month = {2010-02-17},
  publisher = {Physical Review Letters},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904590},
  language = {en},
}