@misc{indiciaec8c4af6e8a3c,
  title = {Direct coupled, full wave phase sensitive detector.},
  author = {D P Ryan},
  year = {1966},
  doi = {10.1063/1.1720221},
  url = {https://pubmed.ncbi.nlm.nih.gov/5909379/},
  note = {Source identifier: 5909379}
}