@article{6823,
  author = {Judah Levine},
  title = {Introduction to time and frequency metrology},
  year = {1999},
  journal = {Review of Scientific Instruments},
  volume = {70},
  pages = {2567-2596},
  month = {Jan-01-1999},
  issn = {00346748},
  doi = {10.1063/1.1149844},
}