@InProceedings{gi07-schafhitzel,
  author = {Schafhitzel, T. and Tejada, E. and Weiskopf, D. and Ertl, T.},
  title  = {{Point-based Stream Surfaces and Path Surfaces}},
  year   = {2007},
  pages  = {289--296},
  booktitle = {{Proceedings of Graphics Interface 2007}}
}