Kobayashi, Masato. “Bijection Between Bigrassmannian Permutations Maximal below a Permutation and Its Essential Set”. The Electronic Journal of Combinatorics 17, no. 1 (May 20, 2010): N27. Accessed March 30, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v17i1n27.