Ma, Shi-Mei, and Yeong-Nan Yeh. “Stirling Permutations, Cycle Structure of Permutations and Perfect Matchings”. The Electronic Journal of Combinatorics 22, no. 4 (December 23, 2015): P4.42. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i4p42.