@misc{indiciaef32c3ffbb592,
  title = {Frequency shift in three-photon resonance.},
  author = {R Friedberg and SR Hartmann and JT Manassah},
  year = {1989},
  doi = {10.1103/physreva.39.93},
  url = {https://pubmed.ncbi.nlm.nih.gov/9900991/},
  note = {Source identifier: 9900991}
}