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\bibitem{daSilva_etal2014} da Silva, J., Hobbs, D., \& Graf S. (2014). Integrating an at-risk student model into learning management systems. (pp. 120--124). Proceedings of the XIX Confer{\^e}ncia Internacional sobre Inform{\'a}tica na Educa{\c c}{\~a}o (TISE2014).

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