Marzuki C, Utami A, Elviyenti M, Muda Y. ON THE TOTAL VERTEX IRREGULARITY STRENGTH OF SERIES PARALLEL GRAPH sp(m,r,4). BAREKENG: J. Math. & App. [Internet]. 1Mar.2024 [cited 13May2024];18(1):0213-22. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/10214