Ayo, J.O., O.O. Owoyele, and T. Dzenda. 2007. “Effects of Ascorbic Acid on Diurnal Variations in Rectal Temperature of Bovan Nera Pullets During the Harmattan Season”. International Journal of Poultry Science 6 (8): 612–616. https://doi.org/10.3923/ijps.2007.612.616.