@misc{indiciaefc526b5e1b77,
  title = {Guidance, flight mechanics and trajectory optimization. Volume 3 - The two-body problem},
  author = {Tamburro, M. B. and Townsend, G. E.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680004620},
  note = {Source identifier: 19680004620}
}