@conference{824981,
  author = {B Young and R Rafac and J Beall and F Cruz and Wayne Itano and David Wineland and James Bergquist},
  title = {HG<sup>+</sup> Optical frequency Standard: Recent Progress},
  year = {1999},
  month = {1999-01-01 00:01:00},
  publisher = {14th Int. Conf. on Laser Spectrosc. , Innsbruck, 1, AU},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105715},
  language = {en},
}