1. A formal language for the design of manufacturable objects;Brown,1994
2. Three models for the description of language;Chomsky;IRE Transactions on Information Theory, IT-2(3),1956
3. Introduction to shape and shape grammars;Stiny;Environment and Planning B,1980
4. The algebras of design;Stiny;Research in Engineering Design,1991
5. A new line on drafting systems;Stiny;Design Computing,1986