@misc{indiciaea27a64a47fa9,
  title = {Optimal time free nodal transfers between elliptical orbits},
  author = {Vinh, Nguyen X. and Kuo, Shau Hern and Marchal, Christian},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880028794},
  note = {Source identifier: 19880028794}
}