R. Rohini, and G. Srividhya. “Some Connectivity Eccentric Indices and Modified Eccentric Indices of Benzenoid $H_k$ System”. Malaya Journal of Matematik 9, no. 01 (January 1, 2021): 431–437. Accessed November 22, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1054.