1. Aklilu, Y. and Wekesa, M., 2002. Drought, livestock and livelihoods: lessons from the 1999–2001 emergency response in the pastoral sector in Kenya. Humanitarian Practice Network Paper, 40
2. Behnke, R. and Muthami, D., 2011. The contribution of livestock to the Kenyan economy. In: Livestock Policy Initiative, 3–11
3. Biffa, D., Jobre, Y. and Chakka, H. 2007. Ovine helminthosis, a major health constraint to productivity of sheep in Ethiopia. Animal Health Research Reviews, 7, 107–118.
4. Catley, A., and Admassu, B. 2003. Using Participatory Epidemiology to Assess the Impact of livestock Diseases. In: FAO- OIE-AU/IBAR-IAEA Consultative Group Meeting on Contagious Bovine Pleuropneumonia. FAO, Rome, Italy.
5. Catley A., Abbebe, D., Admassu, B. and Bekele, G., 2009. Impact of drought - related vaccination on livestock mortality in pastoralist areas of Ethiopia. Disasters, 33, 500–516.