Chimani, Markus, and Carsten Gutwenger. “Algorithms for the Hypergraph and the Minor Crossing Number Problems”. Journal of Graph Algorithms and Applications 19, no. 1 (January 1, 2015): 191–222. Accessed May 9, 2025. https://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper353.