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\bibitem{Liu2010} Liu, M. - C., Wen, D., Kinshuk, \& Huang, Y. -M. (2010). Learning Animal Concepts with Semantic Hierarchy-based Location-aware Image Browsing and Ecology Task Generator. In \& Liu C.-C. R. Pea U. Hoppe. In \textit{Proceedings of the 6th IEEE International Conference on Wireless, Mobile and Ubiquitous Technologies in Education} (pp. 42--49). Los Alamitos: IEEE.

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