Harary spectra and Harary energy of line graphs of regular graphs. Gulf Journal of Mathematics, [S. l.], v. 4, n. 1, 2016. DOI: 10.56947/gjom.v4i1.55. Disponível em: https://gjom.org/index.php/gjom/article/view/55. Acesso em: 26 aug. 2026.