@Article{jgt03-weiskopf,
  author = {Weiskopf, D. and Ertl, T.},
  title  = {{Real-Time Depth-Cueing Beyond Fogging}},
  year   = {2003},
  pages  = {83--90},
  journal = {{Journal of Graphics Tools}},
  volume = 7,
  number = 4
}