@article{CTT100597304,
  author = {K. Asumi and R. Fukunaga and T. Fujimura and M. K. Kurosawa},
  title = {Miniaturization of a V-Shape Transducer Ultrasonic Motor},
  journal = {Jpn. J. Appl. Phys.},
  year = 2009,
}

@article{CTT100587056,
  author = {K. Asumi and R. Fukunaga and T. Fujimura and M. K. Kurosawa},
  title = {High speed, high resolution ultrasonic linear motor using V-shape two bolt-clamped Langevin-type transducers},
  journal = {Acoust. Sci. & Tech.},
  year = 2009,
}