John Olusoji Abiola, Sunday Charles Olaogun, Rahamon Akinyele Moshood Adedokun, and Sunday Kelly Onaro, “Socio-Demographic Structure and Constraints of Smallholder Dairy Farmers in Oyo State, Nigeria”, Int. J. Livest. Res., vol. 9, no. 7, pp. 14–23, Jul. 2019.