Oblong Difference Mean Prime Labeling of Some Planar Graphs. International Journal of Emerging Trends in Science and Technology, [S. l.], v. 4, n. 11, p. 6344–6348, 2017. Disponível em: https://ijetst.in/index.php/ijetst/article/view/1196. Acesso em: 15 jun. 2026.