@conference{121516,
  author = {F Walls and L Nelson and G Valdez},
  title = {Designing for Frequency and Time Metrology at the 10<sup>-18</sup> Level},
  year = {1992},
  month = {1992-01-01},
  publisher = {6^uth^European Frequency and Time Forum , Noordwijk, PA},
  language = {en},
}