@misc{indiciae79074bfcaa15,
  title = {The zero-frequency ion ring instability},
  author = {Gary, S. P. and Pongratz, M. B. and Madland, C. D. and Swift, D. W.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850054288},
  note = {Source identifier: 19850054288}
}