1. Design Theory;Beth,1986
2. Finite Geometries;Dembowski,1968
3. Orthogonal Arrays;Hedayat,1999
4. Projective planes of order 12 do not have an abelian group of order 6 as a collineation group;Horvatic-Baldasar;Punime Mat.,1986
5. On the full collineation group of projective planes of order 12;Horvatic-Baldasar;Punime Mat.,1987