The minimum second Zagreb eccentricity index of graphs with parameters. - Fazal Hayat (Discret. Appl. Math., 2020)

On the maximum connective eccentricity index among k-connected graphs. - Fazal Hayat (Discret. Math. Algorithms Appl., 2021)

Solution to an open problem on the closeness of graphs. - Fazal Hayat; Shou-Jun Xu (CoRR, 2023)

Minimizing the second Zagreb eccentricity index in bipartite graphs with a fixed size and diameter. - Fazal Hayat; Shou-Jun Xu; Xuli Qi (J. Appl. Math. Comput., 2024)

Extremal results on the Mostar index of trees with fixed parameters. - Fazal Hayat; Shou-Jun Xu (Discret. Math. Algorithms Appl., 2025)