Press, 2001.
Good mathematical treatise on Delaunay triangulation and mesh generation for 2-d
and 3-d surfaces.  The chapter on surface simplification is
particularly interesting.  It is similar to facet merging in Qhull.

<p>Veron and Leon published an algorithm for shape preserving polyhedral
simplification with bounded error [<i>Computers and Graphics</i>, 22.5:565-585, 1998].
It remove nodes using front propagation and multiple remeshing.

<h2><a href="#TOC">&#187;</a><a name="halfspace">Halfspace inter