Pontas de seta nas entradas de fortificação - Arrowheads in fortification entries
from CHAPMAN, John (2004) – The origins of warfare in the prehistory of Central and Eastern Europe. In CARMAN, John; HARDING, Anthony, eds – Ancient warfare. Gloucestershire: Sutton Publishing, p.101-142
DIXON, P. (1989) - Crickley Hill. In Burgess, C. et al., eds - Enclosures and defenses in the Neolithic of Western Europe, Oxford: British Archaeological Reports Int. Series 403, p.75-87.