@misc{indiciae0320e9c059e9,
  title = {Mars Deep Drill -- a mission concept for the next decade},
  author = {Essmiller, John C. and Miller, Sylvia L. and Beaty, David W.},
  year = {2004},
  url = {https://ntrs.nasa.gov/citations/20060042993},
  note = {Source identifier: 20060042993}
}