The following publications are possibly variants of this publication:
- Difference Relation-Based Rough Set and Negative Rules in Incomplete Information SystemXibei Yang, Dongjun Yu, Jingyu Yang, Xiaoning Song. ijufks, 17(5):649-665, 2009. [doi]
- Neighborhood systems-based rough sets in incomplete information systemXibei Yang, Ming Zhang, Huili Dou, Jingyu Yang. kbs, 24(6):858-867, 2011. [doi]