@conference{39386,
  author = {Thomas Heavner and Stephan Barlow and Marc Weiss and Neil Ashby and Steven Jefferts},
  title = {A Laser-Cooled Frequency Standard for GPS},
  year = {2011},
  month = {2011-09-20},
  publisher = {Proceedings of the ION GNSS 2011 Conference, Portland, OR},
  language = {en},
}