Ping Deng Frank K. Hwang Weili Wu David MacCallum Feng Wang 0002 Taieb Znati Improved construction for pooling design. 123-126 2008 15 J. Comb. Optim. 1 http://dx.doi.org/10.1007/s10878-007-9093-1 db/journals/jco/jco15.html#DengHWMWZ08