Khoshvaghti , Ameneh, et al. “The Relationship Between Serum Level of Thyroid Hormones and Antioxidant Enzymes in Clinically Healthy Ostriches”. International Journal of Poultry Science, vol. 11, no. 3, Feb. 2012, pp. 202–208, https://doi.org/10.3923/ijps.2012.202.208.