Visontai, Mirkó. “Some Remarks on the Joint Distribution of Descents and Inverse Descents”. The Electronic Journal of Combinatorics 20, no. 1 (March 8, 2013): P52. Accessed March 15, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p52.