On relationships between revised rough fuzzy approximation operators and fuzzy topological spaces. - Mohamed Mohamed Ezzat Abd El-Monsef; Mostafa A. El-Gayar; R. M. Aqeel (Int. J. Granul. Comput. Rough Sets Intell. Syst., 2014)

A comparison of three types of rough fuzzy sets based on two universal sets. - Mohamed Mohamed Ezzat Abd El-Monsef; Mostafa A. El-Gayar; R. M. Aqeel (Int. J. Mach. Learn. Cybern., 2017)

Topological Models of Rough Sets and Decision Making of COVID-19. - Mostafa A. El-Gayar; Abd El Fattah El Atik (Complex., 2022)

Some Topological Approaches for Generalized Rough Sets and Their Decision-Making Applications. - Radwan Abu-Gdairi; Mostafa A. El-Gayar; Tareq M. Al-shami; Ashraf S. Nawar; Mostafa K. El-Bably (Symmetry, 2022)

On Fuzzy Point Applications of Fuzzy Topological Spaces. - Radwan Abu-Gdairi; Arafa A. Nasef; Mostafa A. El-Gayar; Mostafa K. El-Bably (Int. J. Fuzzy Log. Intell. Syst., 2023)

Innovative rough set approaches using novel initial-neighborhood systems: Applications in medical diagnosis of Covid-19 variants. - Mostafa K. El-Bably; Rodyna A. Hosny; Mostafa A. El-Gayar (Inf. Sci., 2025)