@article {39969,
	title = {Sources and oxidative potential of water-soluble humic-like substances (HULISWS) in fine particulate matter (PM2.5) in Beijing},
	journal = {Atmospheric Chemistry and Physics},
	volume = {18},
	year = {2018},
	pages = {5607-5617},
	author = {Yiqiu Ma and Cheng, Yubo and Xinghua* Qiu and et al.}
}
