1. Finite Geometries;Dembowski,1968
2. Latin Squares and Their Applications;Denes,1974
3. Uniqueness of the projective plane with 57 points;Hall,1953
4. Uniqueness of the projective plane of order eight;Hall;Math. Tables Aids Comput.,1956
5. On projective planes of order nine;Hall;Math. Tables Aids Comput.,1959