Cyber-attack-induced equilibria of high-voltage direct-current power transmission systems. - Xu, Haonan; Wei, Qinyu; Li, Kaiyu; Liu, Xiaoqin; Ding, Yulong; Zheng, Dongliang; Feng, Kairui; Song, Yue; Hou, Jiazuo (Autonomous Intelligent Systems, 2026)