@misc{indiciaea4d8213e4bab,
  title = {The Control System for the X-33 Linear Aerospike Engine},
  author = {Jackson, Jerry E. and Espenschied, Erich and Klop, Jeffrey},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19980174934},
  note = {Source identifier: 19980174934}
}