Zhou, Shenglin, and Yajie Wang. “Flag-Transitive Non-Symmetric 2-Designs With $(r,\lambda)=1$ and Alternating Socle”. The Electronic Journal of Combinatorics 22, no. 2 (April 14, 2015): P2.6. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i2p6.