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The L(2,1) Labeling of Windmill, Binomial Tree, Pan, Gear, Prism, Helm, Lilly, Hurdle, and Key Graph. J. of Research in Math. Trends and Tech. [Internet]. 2025 Sep. 19 [cited 2026 Feb. 4];7(2):78-85. Available from: https://idjpcr.usu.ac.id/jormtt/article/view/20040