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\bibitem{2730} Aura Hernandez-Sabate, Meritxell Joanpere, Nuria Gorgorio, \& Lluis Albarracin. (2015).<a target={\textquoteright}_blank{\textquoteright} href={\textquoteright}/files/HJG2015.pdf{\textquoteright}> "Mathematics learning opportunities when playing a Tower Defense Game "</a> . \textit{International Journal of Serious Games}, \textit{2}(4), 57--71.

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