Kalinowski, Thomas, Uwe Leck, and Ian T. Roberts. “Maximal Antichains of Minimum Size”. The Electronic Journal of Combinatorics 20, no. 2 (April 9, 2013): #P3. Accessed May 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i2p3.