@conference{206961,
  author = {Till Rosenband and David Hume and Anders Brusch and Luca Lorini and P. Schmidt and Tara Fortier and Jason Stalnaker and Scott Diddams and Nathan Newbury and W Swann and Windell Oskay and Wayne Itano and David Wineland and James Bergquist},
  title = {Frequency Comparison of Al<sup>+</sup> and Hg<sup>+</sup> Optical Standards},
  year = {2007},
  month = {2007-06-24},
  publisher = {Proc. 2007 ICOLS Meeting, Telluride, CO},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50640},
  language = {en},
}