@inproceedings{Meissner2002Interactive,
  title = {Interactive Lighting Models and Pre-Integration for Volume Rendering on {PC} Graphics Accelerators},
  author = {Mei{\ss}ner, Michael and Guthe, Stefan and Stra{\ss}er, Wolfgang},
  booktitle = {Proc. Graphics Interface ({GI})},
  pages = {209--218},
  month = {May},
  year = {2002}
}