@misc{indiciaea4f9aec963f1,
  title = {Single Piezo-Actuator Rotary-Hammering Drill},
  author = {Sherrit, Stewart and Bao, Xiaoqi and Badescu, Mircea and Bar-Cohen, Yoseph},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20110012270},
  note = {Source identifier: 20110012270}
}