In this paper, we obtained two flag-transitive symmetric \((v, k, \lambda)\) designs admitting primitive automorphism groups of almost simple type with socle \(X = \mathrm{PSL}(12, 2)\).
Citation
Delu Tian, Shenglin Zhou. Flag-Transitive Symmetric \((v, k, \lambda)\) Designs Admitting Primitive Automorphism Groups with Socle PSL\((2, 11)\)[J], Ars Combinatoria, Volume 126. 157-163. .