- ECIS, page 1299-1300. (1995)
- Mathematics and Computers in Simulation 78(2-3):401-411 (2008)
- Int. J. Semantic Computing 3(1):77-90 (2009)
- Cambridge University Press, 3rd edition, (Mar 23, 2009)
- Sainsbury Centre for Mental Health, London, (2003)
- BMC Musculoskelet Disord (2009)
- Ratio 14(4):386--406 (2001)
- HICSS, IEEE Computer Society, (2006)
- ECIW, page 29-38. Academic Conferences Limited, Reading, UK, (2005)


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