1. Dimension-driven geometry in CAD: a survey;Roller,1989
2. System for parametric definition of engineering drawings;Cugini,1985
3. Internal design of design automation software and its consequences for the user;Roller,1986
4. Sketchpad: a man-machine graphical communication system;Sutherland,1963
5. Modification of geometric models through variational geometry;Light;Comput.-Aided Des.,1982