@misc{indiciae5c3dac28a9a9,
  title = {Heliocentric interplanetary low thrust trajectory optimization program, supplement 1},
  author = {Mann, F. I. and Horsewood, J. L.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750012348},
  note = {Source identifier: 19750012348}
}