@misc{indiciaeeabaac3f740b,
  title = {Proposed Josephson voltage standard},
  author = {Chang, C. C. and Holderman, L. B. and Toots, J.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19790000482},
  note = {Source identifier: 19790000482}
}