Hinckley, J.; Park, R.; Xiong, S.; Andersen, W.; Kooyman, D. Identification and Development of Sex Specific DNA Markers in the Ostrich Using Polymerase Chain Reaction. Int. J. Poult. Sci. 2005, 4 (9), 663–669. https://doi.org/10.3923/ijps.2005.663.669.