Borowiec, Anna, and Wojciech Młotkowski. “New Eulerian Numbers of Type $D$”. The Electronic Journal of Combinatorics 23, no. 1 (February 19, 2016): P1.38. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i1p38.