1. FAO FAOSTAThttp://www.fao.org/faostat/en/?#data
2. Study on Gender Distribution of Ownership of Animal Drawn Carts and Its Effect on Women Life in Adami Tullu and Dugda Bora Districts;Garuma,2004
3. Bearing a Heavy Burden;McKenna,2007
4. Voices from Women, Invisible Helpers: Women’s Views on the Contributions of Working Donkeys, Horses and Mules to Their Lives;Valette,2014
5. Invisible Workers: The Economic Contributions of Working Donkeys, Horses and Mules to Livelihoods;Valette,2015