@book{Ulichney:1987:DH,
  www =
         {http://crl.research.compaq.com/who/people/ulichney/bib/DigitalHalftoning/Digital-Halftoning.html},
  optnote = {},
  author = {Robert A. Ulichney},
  optkey = {},
  optannote = {},
  optseries = {},
  optedition = {},
  url = {http://mitpress.mit.edu/catalog/item/default.asp?tid=4433&ttype=2},
  address = {Cambridge},
  publisher = {MIT Press},
  optmonth = {},
  doi = {http://doi.acm.org/10.1145/27674},
  optstatus = {OK},
  optvolume = {},
  optnumber = {},
  title = {{D}igital {H}alftoning},
  year = {1987},
}