F. Bekele, T. Adnoy, H. Gjoen, J. Kathle, and G. Abebe, “Production Performance of Dual Purpose Crosses of Two Indigenous with Two Exotic Chicken Breeds in Sub-tropical Environment”, Int. J. Poult. Sci., vol. 9, no. 7, pp. 702–710, Jun. 2010, doi: 10.3923/ijps.2010.702.710.