1. Denny, P.J.: Co-evolution in uCommerce: Emerging Business Strategies and technologies. Telecommunications Review 13(1), 48–56 (2003)
2. Schank, R.: Dynamic Memory: A Theory of Learning in Computers and People. Cambridge University Press, New York (1982)
3. Nichols, D.M.: Implicit Ratings and Filtering. In: Proceedings of the 5’s DELOS Workshop on Filtering and Collaborative Filtering. ERCIM, Budapaest, Hungary (1997)
4. Sarwar, B., Karypis, G., Konstan, J., Riedl, J.: Analysis of Recommendation Algorithms for E-Commerce. ACM Conference on Electronic Commerce (2000)
5. Gregory, D.A., Dey, A., Orr, R., Brotherton, J.: Computer-awareness in Wearable and Ubiquitous Computing, Georgia Institute of Technology (1997)