@article {PMID:22201480,
	title = {Modern and fossil contributions to polycyclic aromatic hydrocarbons in PM$_{2}$.$_{5}$ from North Birmingham, Alabama in the southeastern U.S},
	journal = {Environmental science \& technology},
	volume = {46},
	number = {3},
	year = {2012},
	month = {February},
	pages = {1422{\textemdash}1429},
	issn = {0013-936X},
	doi = {10.1021/es2043189},
	url = {https://doi.org/10.1021/es2043189},
	author = {Xu, Li and Mei* Zheng and Xiang Ding and Eric S. Edgerton and Reddy, Christopher M}
}
