1. A. Betten, A. Kerber, A. Kohnert, R. Laue, A. Wassermann: The Discovery of Simple 7-Designs with Automorphism Group PΓL(2,32). AAECC 11 in Lecture Notes in Computer Science547 (1995), 281–293.
2. A. Betten, R. Laue, A. Wassermann: Simple 7-Designs With Small Parameters, Spetses, 1996.
3. D. L. Kreher, S. P. Radziszowski: Finding Simple t-Designs by Using Basis Reduction. Congressus Numerantium55 (1986), 235–244.
4. M. Kaib, H. Ritter: Block Reduction for Arbitrary Norms. Preprint 1995.
5. A. K. Lenstra, H. W. Lenstra Jr., L. Lovász: Factoring Polynomials with Rational Coefficients, Math. Ann.261 (1982), 515–534.