1. Blessing LTM,(1994) “A Process-Based Approach to Computer-Supported Engineering Design”, PhD Thesis, University of Twente,1994.
2. Chakrabarti A(1991), Designing by Functions, PhD Thesis, University of Cambridge, 1991
3. Claypole J(1993), “Pondering on Parametrics, Professional Engineering,March 1993
4. Culley SJ, Corderoy MP, Ajderian NJS(1991), “The Concept of Computer Integrated Design”, Proceedings ofEffective CADCAM ‘91, IMechE, 1991.
5. Culley SJ, Webber SJ(1992), “Implementation Requirements for Electronic Standard Component Catalogues”,Proceedings of IMechE Journal of Engineering Manufacture,Vol. 206, pp 253–260, 1992