Yang, Lihong, and Sherry H.F. Yan. “On a Conjecture Concerning Shuffle-Compatible Permutation Statistics”. The Electronic Journal of Combinatorics 29, no. 3 (July 1, 2022): P3.3. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v29i3p3.