@InBook{Lachaud07c,
  author = 	 {J.-O. Lachaud and S. Valette},
  editor = 	 {D. Coeurjolly and A. Montanvert and J.-M. Chassery},
  title = 	 {Géométrie discrète et images numériques},
  chapter = 	 {12. Approximation par triangulation},
  publisher = 	 {Hermès},
  year = 	 {2007},
  series = 	 {Traité IC2},
  note = 	 {In french.}
}