@misc{indiciaeaa03f2a59e46,
  title = {Back to the future - Using nuclear propulsion to go to Mars},
  author = {Bennett, Gary L. and Graham, Scott R. and Harer, Kathleen F.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910059419},
  note = {Source identifier: 19910059419}
}