Hetterich, Samuel, Olaf Parczyk, and Yury Person. “On Universal Hypergraphs”. The Electronic Journal of Combinatorics 23, no. 4 (November 25, 2016): #P4.28. Accessed May 20, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i4p28.