Theory for intuitionistic fuzzy rough sets of two universes. - Bing-Zhen Sun; Wei-Min Ma; Qin Liu (ICMLC, 2011)

Rough vague set over two universes. - Bing-Zhen Sun; You-Quan Xu; Da-Lin Zeng (ICMLC, 2013)

Fuzzy compatibility relation-based decision-theoretic rough set over two universies. - You-Quan Xu; Da-Lin Zeng; Bing-Zhen Sun (ICMLC, 2013)

An approach to decision making based on intuitionistic fuzzy rough sets over two universes. - Bing-Zhen Sun; Wei-Min Ma; Qin Liu (J. Oper. Res. Soc., 2013)