Recent research into the Stone Age of Northeastern Africa - Krzyżniak, Lech; Kroeper, Karla; Kobusiewicz, Michał (Archaeological Museum, 2000)
"Proceedings of the International Symposium organized by the Poznań Archaeological Museum and the Archaeological Commission of the Polish Academy of Sciences, Poznń, Branch for the International Commission of the Later Prehistory of Northeastern Africa, Kierkrz near Poznań, 23-26 August, 1997.