Randi ́c Energy and Randi ́c Estrada Index of a Graph. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 5, n. 1, p. 88–99, 2012. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/1580. Acesso em: 21 nov. 2024.