@inproceedings{bashford2012significance,
  title={A significance cache for accelerating global illumination},
  author={Bashford-Rogers, Thomas and Debattista, Kurt and Chalmers, Alan},
  booktitle={Computer Graphics Forum},
  volume={31},
  number={6},
  pages={1837--1851},
  year={2012},
  organization={Wiley Online Library}
}