Roy Armoni Michael E. Saks Avi Wigderson Shiyu Zhou Discrepancy Sets and Pseudorandom Generators for Combinatorial Rectangles. 412-421 1996 conf/focs/1996 FOCS db/conf/focs/focs96.html#ArmoniSWZ96 http://doi.ieeecomputersociety.org/10.1109/SFCS.1996.548500