@article{786101,
  author = {L-S Ma and A Bartels and Lennart Robertsson and Massimo Zucco and R Windeler and G Wilpers and Christopher Oates and Leo Hollberg and Scott Diddams},
  title = {Optical frequency synthesis and comparison at the 10<sup>-19</sup> level},
  year = {2004},
  number = {303},
  month = {2004-03-19 00:03:00},
  publisher = {Sciences-New York},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105011},
  language = {en},
}