@misc{indiciae71a8395084ce,
  title = {Tethers and asteroids for artificial gravity assist in the solar system},
  author = {Penzo, P. A. and Mayer, H. L.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860039300},
  note = {Source identifier: 19860039300}
}