@article{CTT100711951,
  author = {N. Thong-un and S. Saito and S. Hirata and Y. Orino and M. K. Kurosawa},
  title = {Two-Dimensional Airborne Position and Velocity Measurements Using a Pair of Linear-Period-Modulated Ultrasonic Waves},
  journal = {Acta Acustica united with Acustica},
  year = 2016,
}