Robinson, Terence J. & Matthee, Conrad A. (1999). "Molecular genetic relationships of the extinct ostrich, Struthio camelus syriacus: consequences for ostrich introductions into Saudi Arabia". Animal Conservation. 2 (3): 165–171. Bibcode:1999AnCon...2..165R. doi:10.1111/j.1469-1795.1999.tb00062.x.
harvard.edu
ui.adsabs.harvard.edu
Robinson, Terence J. & Matthee, Conrad A. (1999). "Molecular genetic relationships of the extinct ostrich, Struthio camelus syriacus: consequences for ostrich introductions into Saudi Arabia". Animal Conservation. 2 (3): 165–171. Bibcode:1999AnCon...2..165R. doi:10.1111/j.1469-1795.1999.tb00062.x.
Amir, Osman G. (2006). Wildlife trade in Somalia(PDF). World Conservation Union – Species Survival Commission. p. 12. Archived from the original on July 18, 2011.