Akpotuzor, J.O., et al. “Comparative Study of Serum Iron, Total Iron Binding Capacity and Transferrin Saturation Fraction Levels in Two Groups of Nigerians in Different Socio-Economic Classes”. Pakistan Journal of Nutrition, vol. 6, no. 6, Oct. 2007, pp. 669–671, https://doi.org/10.3923/pjn.2007.669.671.