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2. An international terminology for grazing lands and grazing animals. The forage and grazing terminology committee;Allen;Grass and Forage Science,2011
3. Ben Salem, H. & Louhaichi, M. (2014). Promoting cactus as an alternative and sustainable livestock feed. ICARDA’s publication (Factsheet).
4. Effect of increasing level of spineless cactus (Opuntia ficus-indica var. inermis) on intake and digestion by sheep given straw-based diets;Ben Salem;Animal Sciences,1996
5. Supplementing spineless cactus (Opuntia ficus indica f. inermis) based diets with urea-treated straw or oldman saltbush (Atriplex nummularia). Effetcs on intake, digestion and sheep growth;Ben Salem;Journal of Agricultural Science,2002