Size-resolved effective density of ambient aerosols measured by an AAC–SMPS tandem system in Beijing - Lu, Jiayuan; Shen, Xiaojing; Ma, Qianli; Yu, Aoyuan; Hu, Xinyao; Zhang, Yangmei; Liu, Quan; Liu, Shuo; Che, Huizheng; Zhang, Xiaoye; Sun, Junying (Atmospheric environment (1994), 2024)