Bonichon, Nicolas, Cyril Gavoille, and Nicolas Hanusse. “Canonical Decomposition of Outerplanar Maps and Application to Enumeration, Coding and Generation”. Journal of Graph Algorithms and Applications 9, no. 2 (January 1, 2005): 185–204. Accessed July 6, 2024. http://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper105.