1. Agricultural sample survey. Vol. II. Report on livestock and livestock characteristics (private peasant holdings). Addis Ababa: Central Statistical Authority. Available at: https://searchworks.stanford.edu/view/6509594
2. Mohammed, M., Mindaye, S., Hailemariam, Z., Tamerat, N., Muktar, Y. (2017). Sero-Prevalence of Small Ruminant Brucellosis in Three Selected Districts of Somali Region, Eastern Ethiopia. Journal of Veterinary Science and Animal Husbandry, 5 (1). doi: https://doi.org/10.15744/2348-9790.5.105
3. The center for food security and public health. Available at: https://www.cfsph.iastate.edu/
4. Ali, S., Zhao, Z., Zhen, G., Kang, J. Z., Yi, Z. P. (2019). Reproductive problems in small ruminants (Sheep and goats): a substantial economic loss in the world. Large Animal Review, 25, 215–223. Available at: https://www.largeanimalreview.com/index.php/lar/article/download/63/51/
5. Major animal production constraints in sub-Saharan Africa countries (1994). Peters.