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7Scott Wilson. Europe Focuses on EML [EB/OL].http://www.cetis.ac.uk/content/20011015103421,2003-07-18.
8Rob Koper.Educational Modelling Language:Adding Instructional Design to Existing Specifications[EB/OL]. Heerlen, Open University of the Netherlands,http://www.rz.uni-frankfurt.de/neue_medien/standardisierung/koper_text.pdf,2003-03-28.
9Rob Koper. Modeling Units of Study from a Pedagogical Perspective:The Pedagogical Meta-model Behind EML[EB/OL]. Heerlen, Open University of the Netherlands,http://eml.ou.nl/introduaciton/articles.htm,2003-03-28.
10Rob Koper. From Change to Renewal:Educational Technology Foundations of Electronic Environments[EB/OL]. Heerlen, Open University of the Netherlands,http://iol1.uibk.ac.at/php/documents/pdf/koper-inaugural-address.pdf,2003-03-28.
