1. Abowd, G.D., Atkeson, C.G., Hong, J., Long, S., Kooper, R., Pinkerton, M.: Cyberguide: A Mobile Context-Aware Tour Guide. Wireless Networks (3), 421–433 (1997)
2. Agrawal, R., Somani, A., Xu, Y.: Storage and Querying of E-Commerce Data. In: Proc. of VLDB (2001), http://wotan.liu.edu/docis/lib/
3. AKT, The AKT project (2009), http://www.aktors.org/akt/
4. ALT, ALT - the Association for Learning Technology (2009), http://www.alt.ac.uk/index.html
5. Alvarado, M., Vázquez, M.: Decision making automation based on fuzzy event-condition-action rules (2004), http://delta.cs.cinvestav.mx/~matias/PDF/