Apisit Songsasen, Sornnarin Bangkedphol, and Pornpun Pornsinlapatip. 2002. “Synchronous Fluorescence Spectroscopic Technique: The Tool for Rapid Identification of Polycyclic Aromatic Hydrocarbons (PAHs) at Sub-ppm Level in Liquid Samples”. Agriculture and Natural Resources 36 (3). Bangkok, Thailand:301-11. https://li01.tci-thaijo.org/index.php/anres/article/view/242734.