The following publications are possibly variants of this publication:
- Applications of Bipartite Graphs and their Adjacency Matrices to Covering-based Rough SetsJingqian Wang, William Zhu. FUIN, 156(2):237-254, 2017. [doi]
- Poset Approaches to Covering-Based Rough SetsShiping Wang, William Zhu, Peiyong Zhu. rskt 2010: 25-29 [doi]
- Topological approaches to covering rough setsWilliam Zhu. isci, 177(6):1499-1508, 2007. [doi]
- Covering rough sets based on neighborhoods: An approach without using neighborhoodsPing Zhu. ijar, 52(3):461-472, 2011. [doi]
- Graph and matrix approaches to rough sets through matroidsShiping Wang, Qingxin Zhu, William Zhu, Fan Min. isci, 288:1-11, 2014. [doi]