Hollom, Lawrence, and Benedict Randall Shaw. “Counterexamples to Conjectures on Strong Maximality and Minimality”. The Electronic Journal of Combinatorics 33, no. 2 (April 14, 2026): #P2.11. Accessed April 18, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v33i2p11.