Harmonic Index and Zagreb Indices of Vertex-Semitotal Graphs. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 5, p. 1260–1269, 2020. DOI: 10.29020/nybg.ejpam.v13i5.3725. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3725.. Acesso em: 2 may. 2024.