Cortese, Pier Francesco, Giuseppe Di Battista, Maurizio Patrignani, and Maurizio Pizzonia. “Clustering Cycles into Cycles of Clusters”. Journal of Graph Algorithms and Applications 9, no. 3 (January 1, 2005): 391–413. Accessed June 30, 2024. https://jgaa.info/index.php/jgaa/article/view/paper115.