1. Al-Yakoob S, Saeed T, Khordagui H, Saif M, Al-Matrouk M, Al-Hashash H. Estimation of risk associated with consumption of oil-contaminated seafood by Kuwait's population. Final Report. EES 121, KISR 4631, 1995.
2. Bharma RK, Costa M. Trace elements, aluminum, arsenic, cadmium, mercury and nickel. In: Lippmann M, editor. Environmental toxicants: human exposures and their health effects. New York: Van Nostrand Reinhold, 1992:575–632.
3. CSO (Central Statistical Office of the Kuwait Government). Annual Statistical Abstract. Kuwait: Kuwait Ministry of Planning, 1989.
4. EPA (US Environmental Protection Agency). Exposure factors handbook. Office of Health and Environmental Assessment. EPA/600/8-89/043, 1989.
5. Fecal nickel excretion by healthy adults;Horak;Clin Chem,1973