Yu, Lei, Xinmin Hou, Yue Ma, and Boyuan Liu. “Exact Minimum Codegree Thresholds for $K_4^-$-Covering and $K_5^-$-Covering”. The Electronic Journal of Combinatorics 27, no. 3 (August 7, 2020): P3.22. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i3p22.