The Delaunay Constrained Triangulation: The Delaunay Stable Algorithms. - L. Rognant; Jean-Marc Chassery; S. Goze; J. G. Planès (IV, 1999)

Contour Lines and DEM: Generation and Extraction. - L. Rognant; J. G. Planès; M. Memier; Jean-Marc Chassery (Digital Earth Moving, 2001)