The sharp lower bound of tricyclic graphs with respect to the ISI index: applications in octane isomers and benzenoid hydrocarbonsQun Zhang, Shahid Zaman, Asad Ullah, Parvez Ali and Emad E. MahmoudEur. Phys. J. E, 48 2 (2025) 10DOI: https://doi.org/10.1140/epje/s10189-025-00474-7