1. Abate T. 2007. Traditional utilization practices and condition assessment of then rangelands in Rayitu district of Bale zone, Ethiopia [dissertion]. Dire Dewa, Ethiopia: Haramaya University. 129.
2. Abule E. 2003. Rangeland evaluation in relation to pastoralists’ perceptions in the Middle Awash Valley of Ethiopia [dissertion]. Bloemfontein, South Africa: University of the Free State.
3. Seasonal variability in nutritive value of ruminant diets under open grazing system in the semi-arid rangeland of Sudan (South Darfur State)
4. Adugna T, Yami A, Dawit A. 2012. Livestock feed resources in Ethiopia: Challenges, opportunities and the need for transformation. Ethiopia Animal Feed Industry Association, Addis Ababa, Ethiopia.