Cemal Yilmaz Myra B. Cohen Adam A. Porter Covering Arrays for Efficient Fault Characterization in Complex Configuration Spaces. 20-34 2006 32 IEEE Trans. Software Eng. 1 http://doi.ieeecomputersociety.org/10.1109/TSE.2006.8 db/journals/tse/tse32.html#YilmazCP06