Ladokun, A.O., et al. “Haematological and Serum Biochemical Indices of Naked Neck and Normally Feathered Nigerian Indigenous Chickens in a Sub Humid Tropical Environment”. International Journal of Poultry Science, vol. 7, no. 1, Dec. 2007, pp. 55–58, https://doi.org/10.3923/ijps.2008.55.58.