@inproceedings{liu2015snooping,
  title={Snooping Keystrokes with mm-level Audio Ranging on a Single Phone},
  author={Liu, Jian and Wang, Yan and Kar, Gorkem and Chen, Yingying and Yang, Jie and Gruteser, Marco},
  booktitle={Proceedings of the 21st Annual International Conference on Mobile Computing and Networking},
  pages={142--154},
  year={2015},
  organization={ACM}
}