El-Bably, Mostafa Kamel, A.M. Kozae, and M. E. Abd El-Monsef. 2014. “New Generalized Definitions of Rough Membership Relations and Functions from Topological Point of View”. JOURNAL OF ADVANCES IN MATHEMATICS 8 (3):1635-52. https://doi.org/10.24297/jam.v8i3.2575.