@InProceedings{vg03-schulze,
  author = {Schulze, J.P. and Kraus, M. and Lang, U. and Ertl, T.},
  title  = {{Integrating Pre-Integration into the Shear-Warp Algorithm}},
  year   = {2003},
  pages  = {109-118},
  booktitle = {{Proceedings of Third International Workshop on Volume Graphics}}
}