Holliday, Sarah, Jennifer Vandenbussche, and Erik E. Westlund. “Every Graph $G$ Is Hall $\Delta(G)$-Extendible”. The Electronic Journal of Combinatorics 23, no. 4 (November 10, 2016): P4.19. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i4p19.