V. JEBA RANI; S. SUNDAR RAJ; T. SHYLA ISAAC MARY. Non-adjacent vertex sum polynomial of Umbrella graphs, Jahangir graph, Tadpole graph and Lollipop graph. Malaya Journal of Matematik, India, v. 9, n. 01, p. 941–944, 2021. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1201. Acesso em: 16 jul. 2024.