@misc{indiciae40f446fbfad7,
  title = {Optimal trajectory synthesis for terrain-following flight},
  author = {Menon, P. K. A. and Cheng, V. H. L. and Kim, E.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910060516},
  note = {Source identifier: 19910060516}
}