Lian-Yin Zhai Li Pheng Khoo Zhao-Wei Zhong Design concept evaluation in product development using rough sets and grey relation analysis. 7072-7079 2009 36 Expert Syst. Appl. 3 http://dx.doi.org/10.1016/j.eswa.2008.08.068 db/journals/eswa/eswa36.html#ZhaiKZ09a