The first type of graded rough set based on rough membership function. - Weihua Xu 003; Shihu Liu; Qiaorong Wang; Wenxiu Zhang (FSKD, 2010)

A Generalized Multi-granulation Rough Set Approach. - Weihua Xu 003; Xiantao Zhang; Qiaorong Wang (ICIC (3), 2011)

Multi-granulation rough sets based on tolerance relations. - Weihua Xu 003; Qiaorong Wang; Xiantao Zhang (Soft Comput., 2013)

Multi-granulation fuzzy rough sets. - Weihua Xu 003; Qiaorong Wang; Shuqun Luo (J. Intell. Fuzzy Syst., 2014)