H. Janetzko, M. C. Hao, S. Mittelstädt, U. Dayal and D. A. Keim.
Enhancing Scatter Plots Using Ellipsoid Pixel Placement and Shading.
Proceedings of the 46th Annual Hawaii International Conference on System Sciences, IEEE Computer Society, 1522-1531, DOI: 10.1109/HICSS.2013.197, 2013.
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D. A. Keim, M. C. Hao, U. Dayal, H. Janetzko and P. Bak.
Generalized Scatter Plots.
Information Visualization Journal (IVS), Macmillan Publishers Ltd., DOI: 10.1057/ivs.2009.34, 2009.
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