1. Advanced Distributed Learning (ADL). http://www.adlnet.org (2007). Accessed 30 September 2007
2. Ballstaedt, S.-P.: Wissensvermittlung die Gestaltung von Lernmaterial. Weinheim, Beltz PsychologieVerslagsUnion (1997)
3. Barrit, C., Lewis, D., Wieseler, W.: CISCO Systems Reusable Information Object Strategy Version 3.0. Cisco Whitepaper. http://www.cisco.com/warp/public/779/ibs/solutions/learning/whitepapers/el_cisco_rio.pdf (1999). Accessed 30 September 2007
4. Bechhofer, S., van Harmelen, F., Hendler, J.A., Horrocks, I., McGuinness, D.L., Patel-Schneider, P.F., Stein, L.A., Dean, M., Schreiber, G. (eds.): OWL Web Ontology Language Reference, World Wide Web Consortium, Recommendation REC-owl-ref-20040210, February 2004
5. Brooks, J., Jesukiewicz, P.: SCORM reuse: current reality, challenges, and best practices. In: Proceedings of the Interservice/Industry Training, Simulation, and Education Conference (I/ITSEC), Florida, 4–7 December 2006