@misc{indiciae7dd8a12a747e,
  title = {Program manual for HILTOP, a heliocentric interplanetary low thrust trajectory optimization program. Part 2: Subroutine descriptions},
  author = {Mann, F. I. and Horsewood, J. L.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750020013},
  note = {Source identifier: 19750020013}
}