@Article{SCI:Gre2002b,
  author =    "J. Gregor and S.S. Gleason and M.J. Paulus and J.
              Cates",
  title =     "Fast Feldkamp Reconstruction Based on Focus of
              Attention and Distributed Computing",
  journal =   j-IJIST,
  volume =    "12",
  number =    "6",
  pages =     "229--234",
  year =      "2002",
}