@misc{indiciaeba9f2b27ac20,
  title = {Even-harmonic generation in free-electron lasers.},
  author = {MJ Schmitt and CJ Elliott},
  year = {1986},
  doi = {10.1103/physreva.34.4843},
  url = {https://pubmed.ncbi.nlm.nih.gov/9897870/},
  note = {Source identifier: 9897870}
}