@inproceedings{CTT100722893,
  author = {Sae Ito and Ryohei Nakamura and Hiroki Tanaka and Yosuke Mizuno and Marie Tabaru and Kentaro Nakamura},
  title = {Non-contact mass measurement of droplet based on free oscillation under ultrasonic levitation},
  booktitle = {Proceedings of 2015 IEEE International Ultrasonic Symposium},
  year = 2015,
}

@inproceedings{CTT100722897,
  author = {Sae Ito and Ryohei Nakamura and Hiroki Tanaka and Yosuke Mizuno and Marie Tabaru and Kentaro Nakamura},
  title = {Non-contact mass measurement of droplet based on free oscillation under ultrasonic levitation},
  booktitle = {Proceedings of 2015 IEEE International Ultrasonic Symposium},
  year = 2015,
}