@misc{indiciae28669957131a,
  title = {Deep Drilling and Sampling via the Wireline Auto-Gopher Driven by Piezoelectric Percussive Actuator and EM Rotary Motor},
  author = {Bar-Cohen, Yoseph and Badescu, Mircea and Sherrit, Stewart and Zacny, Kris and Paulsen, Gale L and Beegle, Luther and Bao, Xiaoqi},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20130000270},
  note = {Source identifier: 20130000270}
}