@misc{indiciae03520a504ca9,
  title = {Circulating transportation orbits between earth and Mars},
  author = {Friedlander, A. L. and Niehoff, J. C. and Byrnes, D. V. and Longuski, J. M.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860063167},
  note = {Source identifier: 19860063167}
}