@conference{179776,
  author = {Svenja Knappe and V Shah and Alan Brannon and Vladislav Gerginov and Hugh Robinson and Z Popovic and Leo Hollberg and John Kitching},
  title = {Advances in Chip-Scale Atomic Frequency References at NIST},
  year = {2007},
  number = {6673},
  month = {2007-09-12},
  publisher = {Proc. SPIE Conf., San Diego, CA},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50588},
  language = {en},
}