1. Brown, D. and Chandrasekaran, B.: Investigating Routine Problem Solving. In: Tong, C. and Sriram, D. (Ed.): Artificial Intelligence in Engineering Design Volume 1 — Design Representation and Models of Routine Design, Academic Press Inc, (1992) pp. 221–250
2. Bullock, F.: Bullock per comm., Discussion of Bridge Estimating Practices (1994)
3. Cadogan, J.V.: Integrated Exploratory Process of Design (1998)
4. Cadogan, J.V., Miles, J.C. and Moore, C.J.: Comp. Support for the Design and Costing of Bridge Foundations. In: Kumar, B. (Ed): Information. Proc. in Civil & Struct. Eng. Design, Civil Comp Press (1996) pp 113–120
5. Gero, J.S., Kumar. B,: Expanding Design Spaces Through New Design Variables. Design Studies, Vol. 14, No. 2, April (1993) pp. 210–221