4[11]Pawlak Z. Rough sets[J] .Inter J of Computer and Information Sciences,1982,11(2):341-356.
5[12]Pawlak Z. Vagueness and Uncertainty: A Rough Set Prospective[J] . Inter J of Computer and Information Sciences, 1995,11(2): 227-232.
6[13]Düntsch I, Gediga G.Simple Data Filtering in Rough Set[J]. International Journal of Approximate Reasoning, 1998, 18(1-2): 93-106.
7[14]Düntsch I, Gediga G. Statistical Evaluation of Rough Set Dependency Analysis[J]. International Journal of Human-Computer Studies, 1997, 46(5): 589-604.
8[17]Ziarko W.The Discovery, Analysis and Representation of Data Dependencies in Databases[A] . Piatetsky-shapiro G, Frawley W J eds. Knowledge Discovery in Databases[C]. AAA/MIF Press,1990, 213-228