@article{yu_park_lee_2010, 
  title={Optical Clock: Toward 10^{-18} Uncertainty}, 
  volume={19}, 
  DOI={10.3938/phit.19.024}, 
  publisher={Korean Physical Society}, 
  author={YU and PARK and LEE}, 
  year={2010}, 
  month={May}
  }