@article{123691,
  author = {John Kitching and Leo Hollberg and Svenja Knappe and R. Wynands},
  title = {Compact Atomic Clock Based on Coherent Population Trapping},
  year = {2002},
  number = {37},
  month = {2002-01-01},
  publisher = {Electronics Letters},
  language = {en},
}