Zhao, Yunfan, John C Wierman, and Thomas G. Marge. “Perfect Domination Ratios of Archimedean Lattices”. The Electronic Journal of Combinatorics 29, no. 3 (September 23, 2022): #P3.60. Accessed May 15, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v29i3p60.