S. Akila Devi, R. Sophia Porchelvi, and T. Arjun. 2021. “Pronic Heron Mean Labeling on Special Cases of Generalized Peterson Graph P(n;K) and Disconnected Graphs”. Malaya Journal of Matematik 9 (01). India:262-66. https://www.malayajournal.org/index.php/mjm/article/view/1012.