Courtiel, Julien, Andrew Elvey Price, and Irène Marcovici. “Bijections Between Walks Inside a Triangular Domain and Motzkin Paths of Bounded Amplitude”. The Electronic Journal of Combinatorics 28, no. 2 (April 9, 2021): P2.6. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i2p6.