@misc{indiciae5fdb760b8b8e,
  title = {Exoskeletal Engine Concept: Feasibility Studies for Medium and Small Thrust Engines},
  author = {Halliwell, Ian},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20020006948},
  note = {Source identifier: 20020006948}
}