@misc{indiciae71a901084cdf,
  title = {Optimal low thrust geocentric transfer},
  author = {Edelbaum, T. N. and Sackett, L. L. and Malchow, H. L.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19740027915},
  note = {Source identifier: 19740027915}
}