Sandeep Kochhar Jim Hall A Unified, Object-Oriented Graphics System and Software Architecture for Visualising CAD/CAM Presentations. 229-248 1996 15 Comput. Graph. Forum 4 db/journals/cgf/cgf15.html#KochharH96 http://www.eg.org/EG/CGF/volume15/issue4/v15i4pp229-248_abstract.html