Grippo, Luciano N., Adrián Pastine, Pablo Torres, Mario Valencia-Pabon, and Juan C. Vera. “On the $P_3$-Hull Number of Kneser Graphs”. The Electronic Journal of Combinatorics 28, no. 3 (July 30, 2021): #P3.32. Accessed May 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i3p32.