Johnston, J. Travis, and Linyuan Lu. “Turán Problems on Non-Uniform Hypergraphs”. The Electronic Journal of Combinatorics 21, no. 4 (October 30, 2014): P4.22. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i4p22.