Shifeng, Ding, and Liu Weijun. “Existence of 2-$(v,k,1)$ Designs Admitting a Block-Transitive Group of Affine Type”. The Electronic Journal of Combinatorics 19, no. 3 (September 27, 2012): P35. Accessed April 4, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v19i3p35.