1. Bork , A 2001 Four fictional views of the future of learning United States Distance Learning Association Journal http://www.ics.uci.edu/~bork/fiction4
2. IEEE Learning technology standards committee (LTSC) 2001 IEEE P1484.12 Learning object metadata working: scope & purposegroup http://ltsc.ieee.org/wg12/s_p.html
3. New Zealand E-Learning Advisory Group 2002 Highways and pathways: New Zealand Government Press http://ts.mivu.org/default.asp?show=article&id=983