1. 3-Designs from PSL(2,q);Cameron;Discrete Math.,2006
2. The GAP Groups, Gap – Groups, Algorithms and Programming, Version 4, Lehrstuhl D für Mathematik, Rheinisch Westfälische Technische Hochschule, Aachen, Germany and School of Mathematical and Computational Sciences, Univ. St. Andrews, Scotland, 2000
3. Transitivity of finite permutation groups on unordered sets;Livingstone;Math. Z.,1965
4. t-Designs with t⩾3;Khosrovshahi,2006