Huang, Hao, and Benny Sudakov. “The Minimum Number of Nonnegative Edges in Hypergraphs”. The Electronic Journal of Combinatorics 21, no. 3 (July 10, 2014): P3.7. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i3p7.