Ivan Viola M. Eduard Gröller Markus Hadwiger Katja Bühler Bernhard Preim Mario Costa Sousa David S. Ebert Don Stredney 124 2005 conf/visualization/2005 IEEE Visualization http://doi.ieeecomputersociety.org/10.1109/VIS.2005.57 db/conf/visualization/visualization2005.html#ViolaGHBPSES05