Sustained oscillations in modern AC distribution systems with high DER infiltration - Alizadeh, Mojtaba; Xiaoyu, Wang; Lei, Chen; Nassif, Alexandre; Mitra, Bhaskar; Shuang, Feng; Yunzhi, Cheng; Vieira Júnior, José Carlos de Melo; Badizi, Ebrahim Mohammadi (IEEE Transactions on Power Systems, 2025)