By Drachsler Hendrik   Hummel Hans G.K.   Koper Rob   in International Journal of Learning Technology

ISSN:1477-8386|3|4|404-423

Inderscience Publishers‎(2008)‎

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By Reinhardt Wolfgang   Mletzko Christian   Drachsler Hendrik   Sloep Peter B.   in Interactive Learning Environments

ISSN:1049-4820|22|5|594-613

Routledge Ltd‎(2014)‎

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By Hummel Hans G.K.   Berg Bert Van Den   Berlanga Adriana J.   Drachsler Hendrik   Janssen Jose   Nadolski Rob   Koper Rob   in International Journal of Learning Technology

ISSN:1477-8386|3|2|152-168

Inderscience Publishers‎(2007)‎

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