Atail, H. B., H. H. Ibrahaem, Y. A. Shuaib, A. K. Mohamed, S. E. Suliman, S. H. Idris, and M. A. Abdalla. “Sero-Prevalence of Toxoplasmosis in Sheep and Goats in El-Gadarif State”. Journal of Advanced Veterinary and Animal Research, vol. 4, no. 2, July 2017, pp. 207-13, https://www.banglajol.info/index.php/JAVAR/article/view/33122.