@misc{indiciae03908d486b38,
  title = {Mars entry-to-landing trajectory optimization and closed loop guidance},
  author = {Ilgen, Marc R. and Manning, Raymund A. and Cruz, Manuel I.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920060877},
  note = {Source identifier: 19920060877}
}