@misc{indiciaec27c781467a7,
  title = {Redundant disc},
  author = {Barack, W. N. and Domas, P. A. and Beekman, S. W.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780025158},
  note = {Source identifier: 19780025158}
}