1. Alberts, L. K.: 1993, YMIR: a domain-independent ontology for the formal representation of engineering-design knowledge, IFIP Workshop on Formal Design Methods for CAD, Tallinn, Estonia, pp. 139–152.
2. Andersson, K.: 1993, A vocabulary for conceptual design — Part of a design grammar, in J. S. Gero and E. Tyugu (eds), Formal Design Methods for CAD, Elsever Science, Amsterdam, pp. 157–171.
3. Altshuller, G. S.: 1988, Creativity as an Exact Science, Gordon and Breach Scientific Publishers, New York.
4. Brown, D. and Chandrasekaran, B.: 1985, Expert systems for a class of mechanical design activity, in J. S. Gero (ed), Knowledge Engineering in Computer-Aided Design, North-Holland, Amsterdam.
5. Ishi, M., Tomiyama, T. and Youshikava, H.: 1993. A synthetic reasoning method for conceptual design, in M. Wozny and G. Oiling (eds), Towards Worlds Class Manufacturing, Elsiever Science, North-Holland.