@misc{247071,
  author = {David Newell and Eite Tiesinga},
  title = {The International System of Units (SI), 2019 Edition},
  year = {2019},
  month = {2019-08-20},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.SP.330-2019},
  language = {en},
}