@misc{indiciaef3244a19c81b,
  title = {Discrete approximations to optimal trajectories using direct transcription and nonlinear programming},
  author = {Enright, Paul J. and Conway, Bruce A.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900065983},
  note = {Source identifier: 19900065983}
}