@misc{indiciaea927a4cde2bf,
  title = {Observation of quantum frequency conversion.},
  author = {J Huang and P Kumar},
  year = {1992},
  doi = {10.1103/physrevlett.68.2153},
  url = {https://pubmed.ncbi.nlm.nih.gov/10045322/},
  note = {Source identifier: 10045322}
}