New types of graphs induced by topological spaces. - A. M. Kozae; Abd El Fattah El Atik; A. Elrokh; Mohammed Atef (J. Intell. Fuzzy Syst., 2019)

Comparison of six types of rough approximations based on j-neighborhood space and j-adhesion neighborhood space. - Mohammed Atef; Ahmed Mostafa Khalil; Sheng-Gang Li; Abdel Fatah Azzam; Abd El Fattah El Atik (J. Intell. Fuzzy Syst., 2020)

Topological approaches of graphs and their applications by neighborhood systems and rough sets. - Abd El Fattah El Atik; Ashgan S. Wahba (J. Intell. Fuzzy Syst., 2020)

Certain types of coverings based rough sets with application. - A. S. Nawar; Mostafa K. El-Bably; Abd El Fattah El Atik (J. Intell. Fuzzy Syst., 2020)

Correct proof of the main result in "The number of spanning trees of a class of self-similar fractal models" by Ma and Yao. - Abd El Fattah El Atik; Abdallah W. Aboutahoun; A. Elsaid (Inf. Process. Lett., 2021)

Some extensions of covering-based multigranulation fuzzy rough sets from new perspectives. - Mohammed Atef; Abd El Fattah El Atik (Soft Comput., 2021)

Fuzzy topological structures via fuzzy graphs and their applications. - Mohammed Atef; Abd El Fattah El Atik; Ashraf Nawar (Soft Comput., 2021)

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

Comparison of twelve types of rough approximations based on j-neighborhood space and j-adhesion neighborhood space. - Mohammed Atef; Ahmed Mostafa Khalil; Sheng-Gang Li; Abdelfatah Azzam; Heng Liu 003; Abd El Fattah El Atik (Soft Comput., 2022)

A model of π-pre-topological structures and related to human heart. - H. Saber Osman; S. A. El-Sheikh; Abdelaziz E. Radwan; Abdelfattah A. El-Atik (J. Intell. Fuzzy Syst., 2023)

Approximation of simplicial complexes using matroids and rough sets. - Abd El Fattah El Atik (Soft Comput., 2023)

Fuzzy Soft Sets and Decision Making in Ideal Nutrition. - Abdelfattah A. El-Atik; Radwan Abu-Gdairi; Arafa A. Nasef; Saeid Jafari; Mohamed Badr (Symmetry, 2023)