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\bibitem{Chang2008} Chang, M., Tan, Q., Liu, T.-C., \& Lin, O. (2008). Multi-Agent Architecture-based Location-aware Service Project for Ubiquitous Learning. In \textit{In Proceedings of Workshop on Ubiquitous Learning Models for K-12, Higher Education, and Adult Education, in the 16th International Conference on Computers in Education (ICCE 2008)} (pp. 233--240). In the Proceeding of Workshop on Ubiquitous Learning Models for K-12, Higher Education, and Adult Education, in the 16th International Conference on Computers in Education.

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