Interactions between the desert and the Nile valley. Introduction, in: Midant-Reynes, Béatrix; Tristant, Yann (eds), Egypt at its origins 2: proceedings of the International Conference "Origin of the State. Predynastic and Early Dynastic Egypt", Toulouse (France), 5th–8th September 2005. Orientalia Lovaniensia Analecta 172. Leuven

: 565–568