@misc{indiciae4f1e71bb1b48,
  title = {Local-Oscillator Limited Frequency Stability for Passive Atomic Frequency Standards Using Square-Wave Frequency Modulation},
  author = {Greenhall, C. and Dick, G.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20210001138},
  note = {Source identifier: 20210001138}
}