Li, Yalan, Bo Deng, and Chengfu Ye. “New Relationship Between Energy and Estrada Index”. Discontinuity, Nonlinearity, and Complexity 10, no. 4 (August 17, 2026): 617–623. Accessed August 17, 2026. https://lhscientificpublishing.com/index.php/DNC/article/view/1742.