Cardinal, Jean, Stefan Felsner, Tillmann Miltzow, Casey Tompkins, and Birgit Vogtenhuber. “Intersection Graphs of Rays and Grounded Segments”. Journal of Graph Algorithms and Applications 22, no. 2 (January 1, 2018): 273–295. Accessed March 26, 2026. https://jgaa-v5.cs.brown.edu/index.php/jgaa/article/view/paper470.