1. Oxidation and sources of atmospheric NOx during winter in Beijing based on δ18O-δ15N space of particulate nitrate. (1st May 2021) Authors: Zhang, Zhongyi; Guan, Hui; Xiao, Hongwei; Liang, Yue; Zheng, Nengjian; Luo, Li; Liu, Cheng; Fang, Xiaozhen; Xiao, Huayun Journal: Environmental pollution Issue: Volume 276(2021) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗