System-of-systems safety for low-altitude aviation transportation. - Anzhuo Yao; Shanghan Li; Kaifeng Feng; Tengfei Zhang; Xueying Song; Lizhi Wang; Ruixin Wang; Peng He; Hang Zhou; Hang Li; Shuiting Ding; Daqing Li (Reliab. Eng. Syst. Saf., 2026)