@article{Lachaud07a,
  author =	 {J.-O. Lachaud and A. Vialard and de Vieilleville, F.},
  title =	 {Fast, Accurate and Convergent Tangent Estimation on
                  Digital Contours},
  journal =	 "Image and Vision Computing",
  volume = 25,
  issue = 10,
  month = oct,
  pages = {1572--1587},
  year = 2007
}