Grinberg, Darij, and Tom Roby. “Iterative Properties of Birational Rowmotion II: Rectangles and Triangles”. The Electronic Journal of Combinatorics 22, no. 3 (September 20, 2015): #P3.40. Accessed April 18, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i3p40.