@article {609412,
	title = {Effects of emission-sources reduction at different time points on PM2.5 concentration over Beijing Municipality},
	journal = {China Environmental Science},
	volume = {34},
	number = {6},
	year = {2014},
	pages = {1369-1379},
	url = {http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGHJ201406002.htm},
	author = {Shixian Zhai and Xingqin An and Jun Liu and Qizhong Wu and Li, Nan and Xiaoling Zhang}
}
