@misc{indiciae9a0cd0fff90e,
  title = {Gravity gradient attitude control system Patent},
  author = {Gatlin, J. A. and Hoffman, H. C. and Price, H. W. and Zimmerman, B. G.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710017848},
  note = {Source identifier: 19710017848}
}