@article{CTT100612580,
  author = {N. Kishimoto and S. Suzuki and A. Teranishi and M. Asada},
  title = {Frequency Increase of Resonant Tunneling Diode Oscillators in Sub-THz and THz Range Using Thick Spacer Layers},
  journal = {Applied Phys. Express},
  year = 2008,
}

@article{CTT100612581,
  author = {M. Asada and S. Suzuki and N. Kishimoto},
  title = {Resonant Tunneling Diodes for Sub-Terahertz and Terahertz Oscillators},
  journal = {Jpn. J. Appl. Phys.},
  year = 2008,
}

@article{CTT100612582,
  author = {S. Suzuki and N. Kishimoto and M. Asada and N. Sekine and I. Hosako},
  title = {Experiment and theory of the dependence of oscillation characteristics on structure of integrated slot antennas in sub-THz and THz oscillating resonant tunneling diodes},
  journal = {Jpn. J. Appl. Phys.},
  year = 2008,
}