Methuku, Abhishek, and Casey Tompkins. “Exact Forbidden Subposet Results Using Chain Decompositions of the Cycle”. The Electronic Journal of Combinatorics 22, no. 4 (November 27, 2015): P4.29. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i4p29.