@misc{indiciaecba107328977,
  title = {ISECG Global Exploration Roadmap: A Stepwise Approach to Deep Space Exploration},
  author = {Martinez, Roland and Goodliff, Kandyce and Whitley, Ryan},
  year = {2013},
  url = {https://ntrs.nasa.gov/citations/20140002766},
  note = {Source identifier: 20140002766}
}