Aichholzer, Oswin, Thomas Hackl, Sarah Lutteropp, Tamara Mchedlidze, Alexander Pilz, and Birgit Vogtenhuber. “Monotone Simultaneous Embeddings of Upward Planar Digraphs”. Journal of Graph Algorithms and Applications 19, no. 1 (January 1, 2015): 87–110. Accessed June 30, 2024. https://jgaa.info/index.php/jgaa/article/view/paper350.