@misc{56931,
  author = {Edward Kelley},
  title = {Character contrast},
  year = {2009},
  number = {25},
  month = {2009-01-01},
  publisher = {Information Display Magazine},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901128},
  language = {en},
}