Bigeni, Ange. “Combinatorial Interpretations of the Kreweras Triangle in Terms of Subset Tuples”. The Electronic Journal of Combinatorics 25, no. 4 (November 30, 2018): P4.44. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i4p44.