@article{130421,
  author = {Mark Skall},
  title = {Voluntary Voting System Guidelines},
  year = {2005},
  month = {2005-05-01},
  publisher = {Technical Guidelines Development Committee},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50358},
  language = {en},
}