prob028: balanced incomplete block designs

proposed by Steven Prestwich


[1] C. J. Colbourn, J. H. Dinitz (eds.). The CRC Handbook of Combinatorial Designs. CRC Press, 1996.

[2] P. Meseguer, C. Torras. Exploiting Symmetries Within Constraint Satisfaction Search. Artificial Intelligence, vol. 129 no. 1-2, 2001, pp. 133-163.

[3] S. D. Prestwich. Balanced Incomplete Block Design as Satisfiability. 12th Irish Conference on Artificial Intelligence and Cognitive Science, 2001.