@article{CTT100821733,
  author = {Jiang Wu and Yosuke Mizuno and Kentaro Nakamura},
  title = {Piezoelectric motor utilizing an alumina/PZT transducer},
  journal = {IEEE Transactions on Industrial Electronics},
  year = 2020,
}

@inproceedings{CTT100840677,
  author = {Jiang Wu and Yosuke Mizuno and Kentaro Nakamura},
  title = {A high-power ultrasonic motor utilizing torsional/flexural vibrations},
  booktitle = {Proceedings of USE2020},
  year = 2020,
}