@article{song:2009:EVis,
  author = "Yuyan Song and Wei Chen and Ross Maciejewski and Kelly Gaither and David S. Ebert",
  title = "Bivariate Transfer Functions on Unstructured Grids",
  journal = "Journal of Computer Graphics Forum (Special Issue of EuroVis 2009)",
  year = "2009",
  month = June,
  volume = "28",
  number = "3",
}