@TECHREPORT{KamPaa:2009,
  author = {J.-K. Kamarainen and P. Paalanen},
  title = {Experimental Study on Fast {2D} Homography Estimation from a Few
	Point Correspondences},
  institution = {Department of Information Technology, Lappeenranta University of
	Technology},
  year = {2009},
  number = {111},
  url = {http://vision.cs.tut.fi/data/publications/laitosrap111.pdf}
}