1. Design Theory;Beth,1985
2. On some tactical configurations;Hanani;Canad. J. Math.,1963
3. On resolvable designs S3(3, 4, v);Jungnickel;JCT Series A,1986
4. k-difference cycles and the construction of cyclic t-designs;Köhler,1981
5. S.A. Lonz and S.A. Vanstone, private communication.