Thierry  De Putter 

A bladelet core from Tell el-Fara'in - Buto and the origin of obsidian in the Buto-Maadi culture of Lower Egypt, in: Hendrickx, Stan; Friedman, Renée; Ciałowicz, Krzysztof M.; Chłodnicki, Marek (eds), Egypt at its origins: studies in memory of Barbara Adams; proceedings of the International Conference "Origin of the State. Predynastic and Early Dynastic Egypt", Kraków, 28th August–1st September 2002. Orientalia Lovaniensia Analecta 138. Leuven

Pierres de l'Égypte ancienne: guide des matériaux de l'architecture, de la sculpture et de la joaillerie. Connaissance de l'Égypte ancienne 20. Brussels