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\section*{Book Contributions}

\subsection*{2008}

Graf, S. \& K. (2008). Learner Modelling Through Analyzing Cognitive Skills and Learning Styles. In D. \& Sampson J. M. Pawlowski Kinshuk H. H. Adelsberger (Ed.), \textit{Handbook on Information Technologies for Education and Training} (2nd ed., pp. 179--194). Heidelberg.

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