Ruhul Amin, and Sk. Md. Abu Nayeem. “On the F-Index and F-Coindex of the Line Graphs of the Subdivision Graphs”. Malaya Journal of Matematik 6, no. 02 (April 1, 2018): 362–368. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/835.