@misc{indiciae4a0fa5b7f85d,
  title = {Upper limits for frequency up-conversion in the nonlinear photon accelerator.},
  author = {VA Mironov and AM Sergeev and EV Vanin and G Brodin and J Lundberg},
  year = {1992},
  doi = {10.1103/physreva.46.r6178},
  url = {https://pubmed.ncbi.nlm.nih.gov/9908007/},
  note = {Source identifier: 9908007}
}