The First General Zagreb Index of the Zero Divisor Graph for the Ring Zpqk. Punjab University Journal of Mathematics, [S. l.], v. 56, n. 5, p. 135–147, 2024. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/154. Acesso em: 29 jun. 2025.