A. Gursoy, A. Ülker, and N. Kircali Gursoy, “On the Harary index of $\Gamma(\mathbb{Z}_n)$”, Int. J. Maps Math., vol. 7, no. 2, pp. 122–137, Sep. 2024, Accessed: Oct. 03, 2026. Available: https://simadp.com/journalmim/article/view/7-2-1