@conference{88246,
  author = {Tara Fortier and Neil Ashby and James Bergquist and M Delaney and Scott Diddams and Thomas Heavner and Leo Hollberg and Wayne Itano and Steven Jefferts and K Kim and Filippo Levi and Luca Lorini and W Oskay and Thomas Parker and Jon Shirley and J Stalnaker},
  title = {Improved Limits on Variation of the Fine Structure Constant and Violation of Local Position Invariance},
  year = {2007},
  month = {2007-01-01},
  publisher = {IEEE International Frequency Control Symposium Jointly with the 21st European Frequency and Time Forum , Geneva, SZ},
  language = {en},
}