@misc{indiciae8158a0e4556d,
  title = {Blackness enhancement.},
  author = {W L Brigner and J R Deni},
  year = {1991},
  doi = {10.2466/pms.1991.72.3.757},
  url = {https://pubmed.ncbi.nlm.nih.gov/1891311/},
  note = {Source identifier: 1891311}
}