@misc{indiciae74b9a25d8e64,
  title = {Optimal continuous low-thrust trajectories for co-altitude rendezvous.},
  author = {Burrows, R. R. and Wood, G. A.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690054188},
  note = {Source identifier: 19690054188}
}