Noga Alon Daniel J. Kleitman Carl Pomerance Michael E. Saks Paul D. Seymour The smallets n-uniform hypergraph with positive discrepancy. 151-160 1987 7 Combinatorica 2 db/journals/combinatorica/combinatorica7.html#AlonKPSS87 http://dx.doi.org/10.1007/BF02579446