Bai, Shuliang, and Linyuan Lu. “On the Turán Density of $\{1, 3\}$-Hypergraphs”. The Electronic Journal of Combinatorics 26, no. 1 (March 8, 2019): P1.34. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i1p34.