@InBook{Weber:2011:TC,
  author = "Gunther H. Weber and Peer-Timo Bremer and Valerio Pascucci",
  title = {{Topological Cacti: Visualizing Contour-based Statistics}},
  booktitle = "Topological Methods in Data Analysis and Visualization {II}",
  publisher = "Springer Verlag",
  address = "Heidelberg, Germany",
  pages = "63--76",
  note = "LBNL-5018E",
  year = "2011",
}