Mauro Biliotti Vikram Jha Norman L. Johnson Alessandro Montinaro Two-transitive groups on a hyperbolic unital. 526-533 2008 115 J. Comb. Theory, Ser. A 3 http://dx.doi.org/10.1016/j.jcta.2007.07.005 db/journals/jct/jcta115.html#BiliottiJJM08