@article {CHENG201568,
	title = {Humidity plays an important role in the PM2.5 pollution in Beijing},
	journal = {Environmental Pollution},
	volume = {197},
	year = {2015},
	pages = {68 - 75},
	keywords = {Aqueous-phase reaction},
	issn = {0269-7491},
	doi = {http://dx.doi.org/10.1016/j.envpol.2014.11.028},
	url = {http://www.sciencedirect.com/science/article/pii/S0269749114004965},
	author = {Yuan Cheng and Kebin* He and Zhenyu Du and Mei* Zheng and Fengkui Duan and Yongliang Ma}
}
