1. Finite Geometries;Dembowski,1968
2. Cyclic Difference Sets;Baumert,1971
3. Generators in cyclic difference sets;Cohen;J. Combin. Theory Ser. A,1989
4. Finite projective planes and a question about primes;Feit,1990
5. Solvability of groups of odd order;Feit;Pacific J. Math.,1963