@inproceedings{ma2021you,
  title={You Sound Relaxed Now--Measuring Restorative Effects from Speech Signals},
  author={Ma, Yong and Li, Jingyi and Drewes, Heiko and Butz, Andreas},
  booktitle={IFIP Conference on Human-Computer Interaction},
  pages={585--594},
  year={2021},
  organization={Springer}
}