Lecture 18

A technique for drawing directed graphs. Emden R. Gansner, Eleftherios Koutsofios, Stephen C. North, and Kiem-Phong Vo, IEEE Trans. on Software Engineering 19(3), 214-230, 1993.
Hierarchical Edge Bundles: Visualization of Adjacency Relations in Hierarchical Data. Danny Holten, Proc InfoVis 06, published as IEEE TVCG 12(5), p 741-748, 2006.
Murray, Chapter 11 (Note: the textbook is available electronically through the UA Library for those on campus)