@misc{indiciae92c4b763f2d8,
  title = {Knowledge-Based Flight-Status Monitor},
  author = {Duke, E. L. and Disbrow, J. D. and Butler, G. F.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910000629},
  note = {Source identifier: 19910000629}
}