@conference{99086,
  author = {Michael Kelley},
  title = {The Electronic Kilogram},
  year = {2001},
  month = {2001-05-01},
  publisher = {Tech. Dig.,   IEEE MTT-S International Microwave Symposium, Phoenix, AZ},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=16730},
  language = {en},
}