Harary index of unicyclic graphs with n vertices and k pendent vertices
CAI Gai-Xiang, YU Gui-Dong, XING Bao-Hua
Journal of East China Normal University(Natural Sc . 2015, (1): 120 -125 .  DOI: 10.3969/j.issn.1000-5641.2015.01.014