1. Simple groups of Lie type;Carter,1972
2. Association schemes of partially balanced blocks designs with parameters v = 28, n1 = 12, n2 = 15 and p112 = 4;Chang;Sci. Record,1960
3. Spektren endlicher Grafen;Collatz;Abh. Math. Sem. Hamburg,1957
4. Regular Polytopes;Coxeter,1973
5. Bounds for systems of lines, and Jacobi polynomials;Delsarte;Philips Research Reports,1975