Hartung, Ulrich. „Cemetery U at Umm El-Qaab and the Funeral Landscape of the Abydos Region in the 4th Millennium BC“. Desert and the Nile. Prehistory of the Nile Basin and the Sahara : Papers in Honour of Fred Wendorf , herausgegeben von Jacek Kabaciński u. a., Propylaeum, 2021, S. 313-35, https://doi.org/10.11588/propylaeum.830.c10640.