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Mathews, Moffat, Madan Challa, Cheng-Tse Chu, Gu Jian, Hartmut Seichter, and Raphael Grasset. "Evaluation of spatial abilities through tabletop AR." In 7th ACM SIGCHI New Zealand Chapter’s international Conference on Computer-Human interaction: Design Centered HCI, 17-24. Hamilton, New Zealand: ACM Press, New York, 2007.