By Schildkamp Elvira Folmer; Nienke Nieveen; Kim   in International Journal of Learning Technology

ISSN:1477-8386|6|2|183-200

Inderscience Publishers‎(2011)‎

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By Luyten Hans   Schildkamp Kim   Folmer Elvira   in Educational Research and Evaluation

ISSN:1380-3611|15|3|265-283

Routledge Ltd‎(2009)‎

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