References
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French, M. J. (1985) Conceptual Designing for Engineers, Design Council, London.
Hadland, T. and Pinkerton, J. (1996) It's in the Bag, Hadland.
Maccoby, M. (1991), 'The innovative mind at work',IEEE Spectrum, pp. 23–35.
March, L. J. (1984) The Logic of Design, in N. Cross (ed.) Developments in Design Methodology, Wiley, Chichester.
Pahl, G. and Beitz, W. (1996) Engineering Design, 2nd edn., Springer, London.
Ritchie, A. (1999) Private interview with Adrian Demaid of the Open University, 11 March 1999.
Sobel, D. (1995) Longitude, Walker Publishing Co. Inc.