@misc{indiciae971c5e9d60d2,
  title = {PERISCOPE: PERIapsis Subsurface Cave Optical Explorer},
  author = {Nosanov, Jeff and Velten, Andreas and Mitchell, Karl L.},
  year = {2019},
  url = {https://ntrs.nasa.gov/citations/20190000917},
  note = {Source identifier: 20190000917}
}