1. Sketch pad a man-machine graphical communication system;Sutherland,1964
2. Modeling in the design process;Voelcker;Des Anal Integr Manuf Syst,1988
3. Representations for rigid solids: Theory, methods and systems;Requicha;ACM Comput. Surv.,1980
4. Geometric and solid modeling;Hoffmann,1989
5. Solid modeling;Shapiro,2002