Guan, Haiyan, and Shenglin Zhou. “Non-Existence of Point-Transitive 2-(106, 6, 1) Designs”. The Electronic Journal of Combinatorics 21, no. 1 (March 17, 2014): P1.58. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i1p58.