@Article{SCI:Sil2007a,
  author =    "C.T. Silva and J. Freire and S.P. Callahan",
  title =     "Provenance for Visualizations: Reproducibility and
              Beyond",
  journal =   "IEEE Computing in Science and Engineering",
  volume =    "9",
  number =    "5",
  pages =     "82--89",
  year =      "2007",
  keywords =  "vistrails, provenance, workflow management",
  url =       "http://www.sci.utah.edu/publications/silva07/Silva_ProvenanceForVis.pdf",
}