@misc{indiciae15c2abcfb621,
  title = {Density waves in Saturn's rings},
  author = {Cuzzi, J. N. and Lissauer, J. J. and Shu, F. H.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810060806},
  note = {Source identifier: 19810060806}
}