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Díaz, P.: Usability of hypermedia educational e-books (2003)
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Ford, N.: "Conversational" information systems : Extending educational informatics support for the web-based learner (2005)
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Lubas, R.L.; Wolfe, R.H.W.; Fleischman, M.: Creating metadata practices for MIT's OpenCourseWare Project (2004)
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Mirabella, V.; Kimani, S.; Gabrielli, S.; Catarci, T.: Accessible e-learning material: a no-frills avenue for didactical experts (2004)
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Recker, M.M.: Cognitive media types for multimedia information access (1995)
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