@article{1715,
  author = {John Hall},
  title = {Nobel Lecture: Defining and measuring optical frequencies},
  year = {2006},
  journal = {Reviews of Modern Physics},
  volume = {78},
  pages = {1279-1295},
  month = {Jan-11-2006},
  issn = {0034-6861},
  doi = {10.1103/RevModPhys.78.1279},
}