@misc{indiciae971be14a30de,
  title = {An Efficient Universal Trajectory Language},
  author = {Hagen, George E. and Guerreiro, Nelson M. and Maddalon, Jeffrey M. and Butler, Ricky W.},
  year = {2017},
  url = {https://ntrs.nasa.gov/citations/20170009610},
  note = {Source identifier: 20170009610}
}