Clark, Lane. “An Asymptotic Expansion for the Number of Permutations With a Certain Number of Inversions”. The Electronic Journal of Combinatorics 7, no. 1 (August 8, 2000): R50. Accessed March 16, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v7i1r50.