1. Alam, M.J., Biedl, T., Felsner, S., Kaufmann, M., Kobourov, S.G.: Proportional contact representations of planar graphs. Tech. Rep. CS 2011-11, 2011, http://www.cs.uwaterloo.ca/research/tr/2011/CS-2011-11.pdf
2. Lecture Notes in Computer Science;G.D. Battista,1994
3. de Berg, M., Mumford, E., Speckmann, B.: On rectilinear duals for vertex-weighted plane graphs. Discrete Math. 309(7), 1794–1812 (2009)
4. Lecture Notes in Computer Science;T. Biedl,1999
5. Bruls, M., Huizing, K., van Wijk, J.J.: Squarified treemaps. In: Proceedings of the Joint Eurographics/IEEE TVCG Symposium on Visualization, VisSym, pp. 33–42 (2000)