Gutierres G, Mamede R, Santos JL. Commutation Classes of the Reduced Words for the Longest Element of ${\mathfrak S}_n$. Electron. J. Combin. [Internet]. 2020May15 [cited 2026Mar.29];27(2):P2.21. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i2p21