L. D. A. El-Samee, H. M. El-Allawy, and N. A. Maghraby, “Comparative Study on Some Productive Traits of Muscovy and Sudani Ducks in Egypt”, Int. J. Poult. Sci., vol. 11, no. 4, pp. 264–268, Mar. 2012, doi: 10.3923/ijps.2012.264.268.