Renu, Sarita, Sehgal A, Archana Malik. Graceful Labeling of Prime Index Graph of Group Zp × Zpn. Contemp. Math. [Internet]. 2023 Sep. 18 [cited 2024 Jul. 3];4(3):612–619. Available from: https://ojs.wiserpub.com/index.php/CM/article/view/2727