@TechReport{PGSP09,
  author       = "Pacanowski, Romain and Granier, Xavier and Schlick, Christophe and Poulin, Pierre",
  title        = "Volumetric Vector-Based Representation for Indirect Illumination Caching",
  institution  = "INRIA",
  number       = "RR-6983",
  month        = "jul",
  year         = "2009",
  type         = "Research Report",
  url          = "http://iparla.labri.fr/publications/2009/PGSP09"
}