Ayouz, M., Alary, V. and Mekersi, S. (2012) “Analysis of the place and role of Opuntia (Opuntia ficus-indica) in the semiarid agrarian systems of Algeria through surveys and modeling”, Cahiers Agricultures, 21(6), pp. 438–447 (1). doi: 10.1684/agr.2012.0594.