1. Return of the last Neanderthal;Delson;Nature,2006
2. Der Neandertaler;Bolus,2006
3. Wissensmagazin Scinexx, Springer-Verlags. (accessed 21.03.11).
4. The curing of hides and skins in European prehistory;Groenman-van Waateringe;Antiquity,1999
5. Natur und Wesen der Gerberei und des Leders, reprint of the paper published by Verlag der Cottaschen Buchhandlung;Knapp;Collegium,1858