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@electronic{smchome,
  author        = "Nando de Freitas",
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@book{activecontours,
    author = "Andrew Blake and Michael Isard",
    title = "Active Contours",
    year = "1998",
    isbn = "3-540-76217-5",
    url = "http://www.robots.ox.ac.uk/~contours/",
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