1. J. MUHLY, Cayönü Tepesi and the beginnings of metallurgy in the ancient world, in: A. HAUPTMANN, E. PERNICKA, and G. WAGNER (Eds). Archäometallurgie der Alten Welt. Der Anschnitt, Beiheft 7, Bochum, 1989. p. 1.
2. M. WAYMAN, R. SMITH, C. HICKEY, M. DUKE, J. Archaeol. Sci., 12 (1985) 367.
3. R. MADDIN, T. STECH WHEELER, J. D. MUHLY, J. Archaeol. Sci., 7 (1980) 211.
4. A. M. FRIEDMAN, M. CONWAY, M. KASTNER, J. MILSTED, D. METTA, P. R. FIELDS, E. OLSEN, Science, 152 (1966) 1504.
5. P. FIELDS, J. MILSTED, E. HENDRICKSON, R. RAMETTE, Trace impurity in Cu ores and artifacts, in: Science and Archaeology, R. BRILL (Ed.) MIT Press, Cambridge, Massachusetts, 1971, p. 131.