@misc{indiciae88f61501c911,
  title = {Ultra-stable Hg(+) trapped ion frequency standard},
  author = {Prestage, John D. and Dick, G. John and Maleki, Lute},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910016454},
  note = {Source identifier: 19910016454}
}