@Article{steger:12,
  author =       "Carsten Steger",
  title =        "Least-squares estimation of anisotropic similarity
                  transformations from corresponding 2D point sets",
  journal =      "Pattern Recognition Letters",
  year =         "2012",
  volume =       "33",
  number =       "3",
  pages =        "349--355",
  month =        feb
}