1. Sutherland, I.E.: Sketchpad, a Man-Machine Graphical Communication System. Massachusetts Institute of Technology MIT (1963)
2. Bevan, A.: CAD Through The Ages (Or from 1980, at least!). Network Chatter. https://networkchatter.wordpress.com/2012/07/01/cad-through-the-ages-or-from-1980-at-least/. Accessed 05 Apr 2024
3. Bloomenthal, J., et al.: Introduction to Implicit Surfaces. Morgan Kaufmann Publishers Inc., San Francisco (1997)
4. Howitt, D.: Computer-aided design for all. InfoWorld 6(49), 38–39 (1984)
5. Stiny, G., Gips, J.: Shape grammars and the generative specification of painting and sculpture. In: Information Processing 71 Proceedings of the IFIP Congress 1971, vol. 2, pp. 1460–1465 (1972). citeulike-article-id:1526281