Da Fonseca C.M., Saenpholphat, Varaporn, and Zhang, Ping. “Extremal Values for a γ-Labeling of a Cycle With a Triangle”. Utilitas Mathematica 92 (September 9, 2013). Accessed May 8, 2026. https://utilitasmathematica.com/index.php/Index/article/view/933.