Archer, Kassie, Aaron Geary, and Robert Laudone. “Pattern-Avoiding Shallow Permutations”. The Electronic Journal of Combinatorics 33, no. 1 (March 13, 2026): P1.49. Accessed March 15, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v33i1p49.