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\bibitem{Clemens2011} Clemens, C., Chang, M., Wen, D., Kumar, V., Lin, O., \& Kinshuk. (2011). Traces of writing competency -- surfing the classroom, social, and virtual worlds. In \textit{IEEE International Conference on Advanced Learning Technologies} (pp. 625--626). Athens, GA, USA: the 11th IEEE International Conference on Advanced Learning Technology.

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