1. Environmental pollution in Malaysis: trends and prospects;Abdullah;Trend. Anal. Chem.,1995
2. AEA Technology Environment, 1999. Speciated PAH Inventory for the UK. AEA Technology plc, Oxfordshire, UK.
3. Agency for Toxic Substances and Disease Registry, 1995. Toxicological Profile for Polycyclic Aromatic Hydrocarbons (PAHs). Retrieved January 25, 2005, from Agency for Toxic Substances and Disease Registry Web site: http://www.atsdr.cdc.gov/toxprofiles/tp69.html.
4. Polycyclic aromatic hydrocarbons in the urban atmospheric particulate matter in the city of Naples (Italy);Caricchia;Atmos. Environ.,1999
5. Census and Statistics Department, 2004. Hong Kong in Figures. Retrieved February 21, 2004, from Census and Statistics Department, HKSAR Web site: http://www.info.gov.hk/censtatd/eng/hkstat/index2.html.