Zhang, Yongli, and Shenglin Zhou. “Flag-Transitive Non-Symmetric 2-Designs With $(r, \lambda)=1$ and Exceptional Groups of Lie Type”. The Electronic Journal of Combinatorics 27, no. 2 (April 17, 2020): P2.9. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i2p9.