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2. Jeffery, A., Currier, S.: What Is ...IMS Learning Design? Cetis, Standards Briefings Series. JISC (2003), http://zope.cetis.ac.uk/lib/media/WhatIsLD_web.pdf
3. Koper, R., Tattersall, C.: Learning Design: A Handbook on Modelling and Delivering Networked Education and Training. Springer, Heidelberg (2005)
4. Koper, R., Specht, M.: TEN-Competence: Life-Long Competence Development and Learning. In: Cicilia, M.-A. (ed.) Competencies in Organizational e-learning: concepts and tools, pp. 234–252. IGI-Global, Hershey (2008)
5. Sharples, P., Griffiths, D., Scott, W.: Using Widgets to Provide Portable Services for IMS Learning Design. In: Koper, R., Stefanov, K., Dicheva, D. (eds.) Stimulating Personal Development and Knowledge Sharing, Sofia, Bulgaria, October, 30-31, pp. 57–60 (2008)