1. Oakley, K.P.: Man the toolmaker, 5th edn(The Trustees of The British Museum, London 1963)
2. Gurdjian, E.S.: Head injury from antiquity to the present with special reference to penetrating head wounds, 1st edn(Charles C. Thomas, Illinois 1973)
3. McGregor, K.: The drilling of rock, 1st edn(C.R. Books, London 1967)
4. Emery, W.B.: Archaic Egypt, (Penguin books, London 1961)