@misc{indiciae91770d06ebe5,
  title = {Human Exploration of Near-Earth Objects Accessibility Study},
  author = {Abell, Paul and Drake, Bret and Friedensen, Victoria and Mazanek, Dan},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20110015611},
  note = {Source identifier: 20110015611}
}