1. Berners-Lee, T., Hendler, J., Lassila, O.: The Semantic Web. Scientific American 284(5) (2001)
2. Lecture Notes in Computer Science;M. Dzbor,2003
3. Mc Guinness, D.: Question Answering on the Semantic Web. IEEE Intelligent Systems 19(1) (2004)
4. AKT Reference Ontology, http://kmi.open.ac.uk/projects/akt/ref-onto/index.html
5. Burger, J., Cardie, C., Chaudhri, V., et al.: Tasks and Program Structures to Roadmap Research in Question & Answering (Q&A). NIST Technical Report, PDF (2001), available from http://www.ai.mit.edu/people/jimmylin/%0Apapers/Burger00-Roadmap.pdf