@misc{indiciae7323af8b9303,
  title = {Mars Surface Habitability Options},
  author = {Howe, A. Scott and Simon, Matt and Smitherman, David and Howard, Robert and Toups, Larry and Hoffman, Stephen},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20170007011},
  note = {Source identifier: 20170007011}
}