Bigeni, Ange. “Combinatorial Study of Dellac Configurations and $q$-Extended Normalized Median Genocchi Numbers”. The Electronic Journal of Combinatorics 21, no. 2 (May 13, 2014): #P2.32. Accessed April 18, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i2p32.