“Hyper-Zagreb index of graphs based on generalized subdivision related operationsHyper-Zagreb index of graphs based on generalized subdivision related operations”, Punjab Univ. J. Math., vol. 52, no. 5, pp. 89–103, May 2025, Accessed: Sep. 02, 2026. [Online]. Available: https://pujm.pu.edu.pk/index.php/pujm/article/view/348