1. Octtree encoding of free-form surfaces. Integration of this representation into solid modellers;Ayala,1987
2. Geometric modelling using exact octtree representation of polyhedral objects;Brunet,1985
3. Behavior of recursive division surfaces near extraordinary points;Doo;Computer-Aided Design,1978
4. Smooth interpolations to scattered 3D data;Farin,1983
5. Synthesis of volume modelling and sculptured surfaces in BUILD;Jared,1984