@article{budge08caustic,
  author =	 {Brian C. Budge and John C. Anderson and Kenneth
                  I. Joy},
  title =	 {Caustic Forecasting: Unbiased Estimation of Caustic
                  Lighting for Global Illumination},
  journal =	 {Computer Graphics Forum},
  month =	 oct,
  year =	 2008
}