Rutter, Ignaz, and Alexander Wolff. “Augmenting the Connectivity of Planar and Geometric Graphs”. Journal of Graph Algorithms and Applications 16, no. 2 (January 1, 2012): 599–628. Accessed December 7, 2025. https://jgaa-v5.cs.brown.edu/index.php/jgaa/article/view/paper275.