@InProceedings{SCI:San2008b,
  author =    "E. Santos and L. Lins and J.P. Ahrens and J.
              Freire and C.T. Silva",
  title =     "A First Study on Clustering Collections of
              Workflow Graphs",
  booktitle = "Proceedings of the Second International Provenance
              and Annotation Workshop (IPAW 2008)",
  pages =     "160--173",
  year =      "2008",
  keywords =  "vistrails, workflows, provenance",
  url =       "http://www.sci.utah.edu/publications/santos08/ipaw2008b.pdf",
}