Title	On Variable Precision Limited Tolerance Based Dependency in IIS
Author	Chen Wu, Lijuan Wang
Citation	Vol. 6  No. 12  pp. 148-153
Keywords	incomplete information system, variable precision limited tolerance relation rough set model, knowledge dependency.

Title	Knowledge Dependency in Expanded Incomplete Information Systems
Author	Chen Wu, Enbin Wang, Xibei Yang
Citation	Vol. 8  No. 5  pp. 292-296
Keywords	rough set, incomplete information system, knowledge dependency, entropy

Title	Information Retrieval Based on Decompositions of Rough Sets Referring to Fuzzy Tolerance Relations
Author	Chen Wu, Jun Dai
Citation	Vol. 9  No. 3  pp. 270-272
Keywords	Information retrieval, rough set, fuzzy set, fuzzy tolerance relation, dominance relation

Title	The Partial Completion and Reduction of Incomplete Decision Tables
Author	Chen Wu
Citation	Vol. 10  No. 4  pp. 214-218
Keywords	Partial, Completion, Reduction, Incomplete Decision