Liu, B. et al. 2013. Distribution and Source Identification of Polycyclic Aromatic Hydrocarbons Residues in Different Types of Topsoil Collected from Jilin Province, China. Asian Journal of Chemistry. 25, 16 (Oct. 2013), 8957–8960. DOI:https://doi.org/10.14233/ajchem.2013.14930.