@article{CTT100811702,
  author = {Motoaki Hara and Yuichiro Yano and Masatoshi Kajita and Hitoshi Nishino and Yasuhiro Ibata and Shinsuke  Hara and Masaya Toda and Akifumi Kasamatsu and Hiroyuki Ito and Takahito Ono and Tetsuya Ido},
  title = {Microwave oscillator using piezoelectric thin-film resonator aiming for ultraminiaturization of atomic clock},
  journal = {Review of Scientific Instruments},
  year = 2018,
}

@inproceedings{CTT100758754,
  author = {Motoaki Hara and Yuichiro Yano and Masatoshi Kajita and Hitoshi Nishino and Yasuhiro Ibata and Masaya Toda and Shinsuke  Hara and Akifumi Kasamatsu and Hiroyuki Ito and Takahito Ono and Tetsuya Ido},
  title = {Micro Atomic Frequency Standards Employing an Integrated FBAR-VCO Oscillating on the 87Rb Clock Frequency without a Phase-Locked Loop},
  booktitle = {},
  year = 2018,
}