Marzuki, Corry Corazon, Muzdhalifah Marinka Utami, Fitri Aryani, Mona Elviyenti, and Ade Novia Rahma. “On the Total Vertex Irregularity Strength of Series Parallel Graph sp(m,r,3)”. Lattice Journal : Journal of Mathematics Education and Applied 5, no. 2 (December 30, 2025): 160–175. Accessed March 15, 2026. https://ejournal.uinbukittinggi.ac.id/index.php/lattice/article/view/10483.