R. Rohini, G. Srividhya. Some connectivity eccentric indices and modified eccentric indices of Benzenoid $H_k$ system. Malaya J. Mat. [Internet]. 2021 Jan. 1 [cited 2024 Jul. 16];9(01):431-7. Available from: https://www.malayajournal.org/index.php/mjm/article/view/1054