@conference{6254,
  author = {Jun Ye and L.-S. Ma and John Hall},
  title = {Ultrasensitive high resolution laser spectroscopy and its application to optical frequency standards},
  year = {1997},
  journal = {unknown},
  month = {1997-01},
  publisher = {U. S. Naval Observatory},
  address = {Washington, D. C.},
  url = {http://jila.colorado.edu/yelabs/sites/default/files/uploads/PTTI.pdf},
  note = {JILA Pub. 5835},
}