@article{CTT100896357,
  author = {Minoru Kurosawa and Kentaro Nakamura and Takashi Okamoto and Sadayuki Ueha},
  title = {An ultrasonic motor using bending vibrations of a short cylinder},
  journal = {IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control},
  year = 1989,
}