@Misc{BittnerRT07poster,
  author = {Jiri Bittner and Vlastimil Havran},
  year = 2007,
  month = {September},
  title = {RDH: Ray Distribution Heuristics for Construction of Spatial Data Structures},
  booktitle = {IEEE Interactive Symposium on Ray Tracing, posters},
  PUBLISHER    = {IEEE},
  anote = "This is not a publication, but a poster",
}