O. Olumayowa and O. O. Abiodun, “Profit Efficiency and Waste Management in Poultry Farming: The Case of Egba Division, Ogun State, Nigeria”, Int. J. Poult. Sci., vol. 10, no. 2, pp. 137–142, Jan. 2011, doi: 10.3923/ijps.2011.137.142.