1. Adams, J. L.Conceptual Blockbusting, A Guide to Better Ideas, London and New York: W. W. Norton, 1980, 2nd edn (1st end 1974).
2. Beggs, J. S.Mechanism, McGraw-Hill, New York, 1955, ch. 13.
3. Besant, C. B. and Lui, C. W. K.Computer-Aided Design and Manufacture, London: Ellis Horwood, 1986.
4. Bogen, J. E. The Other Side of the Brain: An Appositional Mind,Bulletin of the Los Angeles Neurological Society, 1969.
5. Chakrabarti, A. Designing by Functions, PhD Thesis, Department of Engineering, University of Cambridge, 1991.