Alam, Md. Jawaherul, Therese Biedl, Stefan Felsner, Michael Kaufmann, and Stephen Kobourov. “Proportional Contact Representations of Planar Graphs”. Journal of Graph Algorithms and Applications 16, no. 3 (September 1, 2012): 701–728. Accessed June 30, 2024. https://jgaa.info/index.php/jgaa/article/view/paper276.