@article{239071,
  author = {Mark Keller and Ali Eichenberger and John Martinis and Neil Zimmerman},
  title = {A Capacitance Standard Based on Counting Electrons},
  year = {1999},
  number = {285},
  month = {1999-09-10},
  publisher = {Science Magazine},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926555},
  language = {en},
}