Oladeebo, J.O., and A.I. Ambe-Lamidi. “Profitability, Input Elasticities and Economic Efficiency of Poultry Production Among Youth Farmers in Osun State, Nigeria”. International Journal of Poultry Science, vol. 6, no. 12, Nov. 2007, pp. 994–998, https://doi.org/10.3923/ijps.2007.994.998.