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Zaka, B., Kulathuramaiyer, N., Balke, W.T. & Maurer, H. (2008). Topic-Centered Aggregation of Presentations for Learning Object Repurposing. In C. Bonk, M. Lee & T. Reynolds (Eds.), Proceedings of E-Learn 2008--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 3335-3342). Las Vegas, Nevada, USA: Association for the Advancement of Computing in Education (AACE).