@conference{30411,
  author = {Michael Lombardi and Mitch Narins and Per Engen and Ben Peterson and Sherman Lo and Dennis Akos},
  title = {The Need for a Robust Precise Time and Frequency Alternative to Global Navigation Satellite Systems},
  year = {2012},
  month = {2012-09-17},
  publisher = {Proceedings of 2012 ION GNSS Meeting, Nashville, TN},
  language = {en},
}