Fernandez-Merchant, Silvia, and Rimma Hamalainen. 2023. “Direction-Critical Configurations in Noncentral General Position: Discrete and Computational Geometry, Graphs, and Games”. Thai Journal of Mathematics 21 (4):937–956. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1557.