Burel, S.A. and Valat, C. (2009) The Effect of the Feed on the Host Microflora Interactions in Poultry: An Overview. Proceedings in International Symposium in Sustainable Animal Production—The Challenges and Potential Developments for Professional Farming for 13th Congress of the International Society for Animal Hygiene, 72, 645-652.
 Institute of Medicine (2001) Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Managanese, Molybdenum, Nickel, Silicon, Vanadium and Zinc. Washington DC, 733-736.
 Dekofehiniti, O.O., Omotoyi, I.O., Oloremu, A.G. and Abayomi, T.G. (2012) Heavy Metals Distribution and Lipid Profile in the Stomach of Cow Grazed in Akugbe-Akoko, Ondo State Nigeria. African Journal of Biochemistry Research, 6, 146-149.
 Teresa, M., Vosconcelos, S.D. and Tavares, H.M. (1997) Trace Elements Concentration in Blood and Hair of Young Apprentices of a Technical Professional School. Science of the Total Environment, 205, 189-199. http://dx.doi.org/10.1016/S0048-9697(97)00208-8
 Bendeddouche, B., Zellagvi, R. and Bendeddooche, E. (2004) Levels of Selected Heavy Metals in Fresh Meat from Cattle, Sheep, Chicken and Camel Produced in Algeria. Annual Research and Review and Biology, 4, 1260-125.
 Iwegbue, C.M.A., Nwojei, G.E. and Iyoha, E.H. (2008) Heavy Metal Residues of Chicken Meat, Gizzard and Turkey Meat Consumed in Southern Nigeria. Bulgarian Journal of Veterinary Medicine, 11, 275-280.