1. ConceptNet. http://web.media.mit.edu/~hugo/conceptnet
2. OpenCyc. http://www.opencyc.org
3. Appan, P., Sundaram, H.: Networked multimedia event exploration. In: Proceedings of ACM Multimedia 2004, also AME TR-2004-10, pp. 40–47, October 2004, New York (2004)
4. Atkinson R., Shiffrin R. (1968). Human memory: a proposed system and its control processes. In: Spence K., Spence J. (eds) The Psychology of Learning and Motivation: Advances in Research and Theory. Academic, New York
5. Benitez, A.B., Smith, J.R., Chang, S.-F.: MediaNet: a multimedia information network for knowledge representation. In: Proceedings of the 2000 SPIE Conference on Internet Multimedia Management Systems (IS&T/SPIE-2000), November 6–8, 2000, Boston (2000)