@misc{indiciae1c45d30a8bd7,
  title = {Plasma-beam instabilities in cometary ionospheres},
  author = {Churyumov, Klim I. and Kotsarenko, N. YA. and Lizunov, G. V. and Verkhoglyadova, O. P.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930009952},
  note = {Source identifier: 19930009952}
}