[1]
“The First General Zagreb Index of the Zero Divisor Graph for the Ring Zpqk”, Punjab Univ. J. Math., vol. 56, no. 5, pp. 135–147, May 2024, Accessed: Jun. 29, 2025. [Online]. Available: https://pujm.pu.edu.pk/index.php/pujm/article/view/154