@InProceedings{SCI:Zho2013a,
  author =    "L. Zhou and C.D. Hansen",
  title =     "Transfer Function Design based on User Selected
              Samples for Intuitive Multivariate Volume
              Exploration",
  booktitle = "Proceedings of the 2013 {IEEE} Pacific
              Visualization Symposium ({PacificVis})",
  pages =     "73--80",
  year =      "2013",
  issn =      "2165-8765",
  doi =       "10.1109/PacificVis.2013.6596130",
  url =       "http://www.sci.utah.edu/publications/zhou13/Zhou_PacVis2013.pdf",
}