@misc{indiciae4ba327c70f61,
  title = {Study of direct-return rendezvous trajectories using constant-thrust engines and rendezvous or maneuvering thrusters},
  author = {Fletcher, H. S. and Williams, J. L.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650026352},
  note = {Source identifier: 19650026352}
}