Dean, Alice, William Evans, Ellen Gethner, Joshua Laison, Mohammad Ali Safari, and William Trotter. “Bar K-Visibility Graphs”. Journal of Graph Algorithms and Applications 11, no. 1 (January 1, 2007): 45–59. Accessed December 22, 2024. https://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper136.