Tim Dwyer Bongshin Lee Danyel Fisher Kori Inkpen Quinn Petra Isenberg George G. Robertson Chris North A Comparison of User-Generated and Automatic Graph Layouts. 961-968 2009 15 IEEE Trans. Vis. Comput. Graph. 6 http://doi.ieeecomputersociety.org/10.1109/TVCG.2009.109 db/journals/tvcg/tvcg15.html#DwyerLFQIRN09