@article{CTT100780544,
  author = {K. Ogino and S. Suzuki and M. Asada},
  title = {Phase Locking and Frequency Tuning of Resonant-Tunneling-Diode Terahertz Oscillators},
  journal = {},
  year = 2018,
}

@article{CTT100780543,
  author = {K. Ogino and S. Suzuki and M. Asada},
  title = {Spectral Narrowing of a Varactor-Integrated Resonant-Tunneling-Diode Terahertz Oscillator by Phase-Locked Loop},
  journal = {},
  year = 2017,
}

@article{CTT100780538,
  author = {S. Kitagawa and M. Mizuno and S. Saito and K. Ogino and S. Suzuki and M..Asada},
  title = {Frequency-tunable resonant-tunneling-diode terahertz oscillators applied to absorbance measurement},
  journal = {},
  year = 2017,
}

@inproceedings{CTT100780499,
  author = {K. Ogino and S. Suzuki and M. Asada},
  title = {Phase Locking of Resonant-Tunneling-Diode Terahertz Oscillator Using Bias-Dependent Oscillation Frequency},
  booktitle = {},
  year = 2017,
}

@inproceedings{CTT100780502,
  author = {K. Ogino and S. Suzuki and M. Asada},
  title = {Phase Locking of Resonant-Tunneling-Diode Terahertz Oscillators},
  booktitle = {},
  year = 2017,
}