Houdré, Christian, and Chen Xu. “A Note on the Expected Length of the Longest Common Subsequences of Two i.i.D. Random Permutations”. The Electronic Journal of Combinatorics 25, no. 2 (June 22, 2018): P2.50. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i2p50.