Kitaev, Sergey, and Artem Pyatkin. “On Permutations Avoiding Partially Ordered Patterns Defined by Bipartite Graphs”. The Electronic Journal of Combinatorics 30, no. 1 (February 10, 2023): P1.27. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v30i1p27.