Ballais, Jean-Louis (2000) "Chapter 7: Conquests and land degradation in the eastern Maghreb" p. 133In Barker, Graeme and Gilbertson, David (2000) The Archaeology of Drylands: Living at the Margin Routledge, Londres, Volumen 1, Parte III - Sahara y Sahel, pp. 125-136, ISBN 978-0-415-23001-8
Ballais, Jean-Louis (2000) "Chapter 7: Conquests and land degradation in the eastern Maghreb" p. 134In Barker, Graeme and Gilbertson, David (2000) The Archaeology of Drylands: Living at the Margin Routledge, Londres, Volumen 1, Parte III - Sahara y Sahel, pp. 125-136, ISBN 978-0-415-23001-8