Harden, C. M., and D. B. Penman. “Fixed Point Polynomials of Permutation Groups”. The Electronic Journal of Combinatorics 20, no. 2 (May 9, 2013): P26. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i2p26.