"Motoaki Hara,Yuichiro Yano,Masatoshi Kajita,Hitoshi Nishino,Yasuhiro Ibata,Shinsuke  Hara,Masaya Toda,Akifumi Kasamatsu,Hiroyuki Ito,Takahito Ono,Tetsuya Ido","Microwave oscillator using piezoelectric thin-film resonator aiming for ultraminiaturization of atomic clock",,"Review of Scientific Instruments",,"  89","  10","  105002",2018,Oct.
"Motoaki Hara,Yuichiro Yano,Masatoshi Kajita,Hitoshi Nishino,Yasuhiro Ibata,Masaya Toda,Shinsuke  Hara,Akifumi Kasamatsu,Hiroyuki Ito,Takahito Ono,Tetsuya Ido","Micro Atomic Frequency Standards Employing an Integrated FBAR-VCO Oscillating on the 87Rb Clock Frequency without a Phase-Locked Loop","The 31st IEEE International Conference on Micro Electro Mechanical SystemsiMEMS 2018j",,,,,,2018,Jan.