@conference{203911,
  author = {Marvin Cage},
  title = {Quadratic Frequency Dependence of an AC QHR Device},
  year = {2004},
  month = {2004-06-01},
  publisher = {CPEM Digest, London, UK},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31625},
  language = {en},
}