@incollection{Freudenberg:2004:RTH,
  optnote = {},
  optaddress = {},
  author = {Bert Freudenberg and Maic Masuch and Thomas Strothotte},
  optkey = {},
  optannote = {},
  optseries = {},
  opttype = {},
  editor = {Andrew Kirmse},
  optedition = {},
  localfile = {papers/Freudenberg.2004.RTH.pdf},
  publisher = {Charles River Media},
  optmonth = {},
  booktitle = {{G}ame {P}rogramming {G}ems 4},
  optvolume = {},
  optnumber = {},
  title = {{R}eal-{T}ime {H}alftoning: {F}ast and {S}imple {S}tylized
           {S}hading},
  year = {2004},
  pages = {443-440},
}