Masaki Moriguchi Kokichi Sugihara Constructing Centroidal Voronoi Tessellations on Surface Meshes. 235-245 2008 Generalized Voronoi Diagram http://dx.doi.org/10.1007/978-3-540-85126-4_10 series/sci/2008-158 db/series/sci/sci158.html#MoriguchiS08