@misc{indiciaeef86c31eb7e0,
  title = {Testing and Development of a Percussive Augmenter for Rotary Drills},
  author = {Donnelly, Christopher and Bar-Cohen, Yoseph and Chang, Zensheu and Badescu, Mircea and Sherrit, Stewart},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20150006614},
  note = {Source identifier: 20150006614}
}