@InCollection{vis03-klein,
  author = {Klein, T. and Weiler, M. and Ertl, T.},
  title  = {{A Volume Rendering Extension for the OpenSG Scene Graph API}},
  year   = {2003},
  pages  = {30--31},
  organization = {{IEEE}},
  booktitle = {{Poster Compendium of IEEE Visualization '03}}
}