Reading Ware, Chapter 8: Space Perception and the Display of Data in Space Tufte, Chapter 3: Layering and Separation Intelligently resolving point occlusion. Marjan Trutschl, Georges Grinstein, Urska Cvek, Proc. InfoVis 2003, pp 131-136. Extending Distortion Viewing Techniques from 2D to 3D Data. M. Sheelagh T. Carpendale, David J. Cowperthwaite, and F. David Fracchia, IEEE Computer Graphics and Applications, Special Issue on Information Visualization, 17(4), pp 42 - 51, July 1997. EdgeLens: An Interactive Method for Managing Edge Congestion in Graphs. Nelson Wong, M. Sheelagh T. Carpendale, Saul Greenberg, Proc. InfoVis03, pp 51-58. Optional: Cheops: A Compact Explorer For Complex Hierarchies. Luc Beaudoin, Marc-Antoine Parent, Louis C. Vroomen, Proc. IEEE Vis 1996, pp 87-92. 2