Okwelum, N., B. O. Oduguwa, N. Yahya, O. Gazal, and O. A. Osinowo. “Breed and Diurnal Effects on Leptin and Glucose Concentrations in Tropical Cattle”. Nigerian Journal of Animal Production, vol. 44, no. 3, Jan. 2021, pp. 104-9, doi:10.51791/njap.v44i3.740.