Harishchandra S. Ramane, Hanumappa B. Walikar, Siddani Bhaskara Rao, B. Devadas Acharya, Prabhakar Ramrao Hampiholi, Sudhir R. Jog, Ivan Gutman. Spectra and energies of iterated line graphs of regular graphs. Appl. Math. Lett., 18(6):679-682, 2005. [doi]
Abstract is missing.