Minh, Trần Tuấn, and Nguyễn Minh Hiệp. 2011. “SOME FEATURE REDUCTION ALGORITHMS BY ROUGH SETS”. Dalat University Journal of Science 1 (1,2,3,&4): 43-53. https://doi.org/10.37569/DalatUniversity.1.1,2,3,&4.166(2011).