@misc{indiciaed95c91ce0607,
  title = {Elliptic capture orbits for missions to the near planets.},
  author = {Casal, F. G. and Mascy, A. C. and Swenson, B. L.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680056834},
  note = {Source identifier: 19680056834}
}