J. M. Jassim, R. K. Mossa, M. H. Al-Assadi, and Y. Gong, “Evaluation of Physical and Chemical Characteristics of Male and Female Ducks Carcasses at Different Ages”, Pak. J. Nutr., vol. 10, no. 2, pp. 182–189, Jan. 2011, doi: 10.3923/pjn.2011.182.189.