1. Kuutti, K. and Battarbee, K. Virtual prototypes in usability testing, 2001. Proceedings of 34th Annual Hawaii International Conference on System Science. pp.7–10. New York: IEEE Computer. Society.
2. McClean, R., Johnston, D. and Wade, M. 2002. “Net Impact Study”. Canada: The SME Experience. A Preliminary Report, Canadian e-Business Initiative,http://cebi.ca/410/net_impact.pdf