Ross Maciejewski Stephen Rudolph Ryan Hafen Ahmad M. Abusalah Mohamed Yakout Mourad Ouzzani William S. Cleveland Shaun J. Grannis David S. Ebert A Visual Analytics Approach to Understanding Spatiotemporal Hotspots. 205-220 2010 16 IEEE Trans. Vis. Comput. Graph. 2 http://doi.ieeecomputersociety.org/10.1109/TVCG.2009.100 db/journals/tvcg/tvcg16.html#MaciejewskiRHAYOCGE10