@article{oai:repository.dl.itc.u-tokyo.ac.jp:00000694,
 author = {Yamanaka, Kazuhiro and Ohmae, Noriaki and Ushijima, Ichiro and Takamoto, Masao and Katori, Hidetoshi},
 issue = {23},
 journal = {Physical Review Letters},
 month = {Jun},
 note = {UTokyo Research掲載「水銀・ストロンチウム光格子時計の高精度直接比較に成功」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/highly-precise-comparison-of-mercury-and-strontium-optical-lattice-clocks.html, UTokyo Research "Highly-precise comparison of mercury and strontium optical lattice clocks" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/highly-precise-comparison-of-mercury-and-strontium-optical-lattice-clocks.html},
 title = {Frequency Ratio of 199Hg and 87Sr Optical Lattice Clocks beyond the SI Limit},
 volume = {114},
 year = {2015}
}