Zhang, Y.T., et al. “Determination of Polycyclic Aromatic Hydrocarbons in Soil Sample Using Matrix Solid Phase Dispersion-Stable Isotope Dilution Technique-Gas Chromatography Mass Spectrometry”. Asian Journal of Chemistry, vol. 25, no. 2, Sept. 2012, pp. 1129-32, doi:10.14233/ajchem.2013.13659.