@article{Huang:2010:SPL,
  title = {Sparsely Precomputing The Light Transport Matrix for Real-Time Rendering},
  journal = {21st Eurographics Symposium on Rendering},
  author = {Fu-Chung Huang and Ravi Ramamoorthi},
  number = 4,
  month = {June},
  volume = 29,
  year = 2010,
  url = {http://graphics.cs.berkeley.edu/papers/Huang-SPL-2010-06/},
}