The Delaunay tetrahedralization from Delaunay triangulated surfaces Sunghee Choi.

Sunghee Choi The Delaunay tetrahedralization from Delaunay triangulated surfaces Sunghee Choi. 145-150 2002 Symposium on Computational Geometry http://doi.acm.org/10.1145/513400.513419 db/conf/compgeom/compgeom2002.html#Choi02