@InProceedings{AdjointPhotonGI06,
  title =        "Image Synthesis using Adjoint Photons",
  author =       "R. Keith Morley and Solmon Boulos and David Edwards
                 and Jared Johnson and Peter Shirley and Michael
                 Ashikhmin and Simon Premo\u{z}e",
  booktitle =    "Graphics Interface '06",
  year =         "2006",
  month =        Jun,
  pages =        "179--186",
}