1. On topological covering-based rough spaces;Chen;Int. J. Phys. Sci.,2011
2. A comparison of two types of rough sets induced by coverings;Liu;Int. J. Approx. Reason.,2009
3. Approximation operators in approximation space;Pomykala;Bull. Polish Acad. Sci. Math.,1988
4. Multi-covering based rough set model, rough sets, fuzzy sets, data mining, and granular computing;Wang;Lect. Notes Comput. Sci.,2013
5. New Approach to covering rough sets via relations;Abd El-Monsef;Int. J. Pure Appl. Math.,2014