Ballais, Jean-Louis (2000): «Chapter 7: Conquests and land degradation in the eastern Maghreb», s. 133 i: Barker, Graeme & Gilbertson, David (2000): The Archaeology of Drylands: Living at the Margin, Routledge, London, Volume 1, Part III - Sahara and Sahel, s. 125-136, ISBN 978-0-415-23001-8
Ballais, Jean-Louis (2000): «Chapter 7: Conquests and land degradation in the eastern Maghreb», s. 134 i: Barker, Graeme & Gilbertson, David (2000): The Archaeology of Drylands: Living at the Margin, Routledge, London, Volume 1, Part III - Sahara and Sahel, s. 125-136, ISBN 978-0-415-23001-8