@misc{indiciaeefc9570a2777,
  title = {Parametric amplification in plasmas with negative energy waves.},
  author = {Davidson, R. and Goldman, R. and Hasegawa, A.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690060255},
  note = {Source identifier: 19690060255}
}